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- Newsgroups: comp.graphics.visualization
- Path: sparky!uunet!think.com!ames!data.nas.nasa.gov!amelia.nas.nasa.gov!eugene
- From: eugene@amelia.nas.nasa.gov (Eugene N. Miya)
- Subject: [l/m 10/15/1992] Shell (1/4) c.g.v.FAQ
- Followup-To: poster
- Sender: news@nas.nasa.gov (News Administrator)
- Organization: NAS Program, NASA Ames Research Center, Moffett Field, CA
- Date: Fri, 1 Jan 93 12:45:19 GMT
- Message-ID: <1993Jan1.124519.27618@nas.nasa.gov>
- Reply-To: eugene@amelia.nas.nasa.gov (Eugene N. Miya)
- Lines: 2801
-
- #Disabled
- Archive-name: comp.viz.faq
-
- "Feed me." -- Audrey II, the Plant in "The Little Shop of Horrors."
-
- Contents
- ========
-
- Intro
- -----
- What is visualization?
- ----------------------
- Systems
- -------
- Issue/problems
- --------------
- Netiquette
- ----------
- References
- ----------
- ================================
-
-
- The FAQ is dedicated to Harold "Doc" Edgerton (MIT).
-
-
- Intro
- -----
-
- The quality of this FAQ is directly proportional to the information
- mailed by participants (that's you) to the maintainer (me, Amelia).
- You don't like it? Blame the rest of the posters and readers.
- I don't have 100% time to maintain this. We are starting from scratch.
- If an address or phone is out of date? Blame the group. I'm just a dumb
- computer posting as I am told.
-
- [It's getting better, people are emailing contributions!]
-
- The structure of this FAQ is currently a twice monthly post, with two
- weekly outriggers pointing to the Long (this) version. We will see how well
- this works (empirical science). The header, the body, etc. have all been
- specially designed and tested. In time, mitosis will occur on this file
- and it will get spread over the course of a month.
-
- You should not have to see this file all the time. Don't bother saving it
- unless you have a flakey net connection. Grab the most recent revision
- off the net. The Subject: line is designed to fit within the 24-char limit
- of most Killfile systems. Learn about Killfiles. If you have something
- against FAQ files, the regular expression /.*FAQ$/ will Kill All My Children
- and me. Learn how to use news and how news works before complaining.
- This post is like a lighthouse or a fog horn. Learn how to use it.
-
-
-
- What is visualization?
- ======================
-
- "Visualization is the use of computer-generated media based
- on data in the service of human insight/learning."
-
- Analytic graphics
- --Carol Hunter, LLNL
-
- Visualization:
- The use of computer imagery to gain
- insight into complex phenomena.
-
- The purpose of visualization is insight, not virtual realities or numbers.
- --enm
-
- The Maintainer gets a chance to pontificate here: [You can, too. Just ask.]
-
- I learned from Jack Estes (UCSB) that observation has three recursive
- phases and corresponding mathematical models:
- Detection
- Identification
- Measurement and Analysis (this latter being the recursion).
- Any good system will support these (reducibly). Researchers need the latter.
- Artistes only use the first (Calder was an exception, but then he trained
- as an aerodynamicist 8^). We don't teach observation very well in schools
- these days. We assume you have picked it up via osmosis or are naturally
- gifted. It requires training and some talent. It's especially bad in
- computer science depts. because of the emphasis in theory.
-
- It is Miya's assertation that ultimately visualization will converge
- of technologies like those used in cartography (>2000 years old),
- surveying, photogrammetry (aerial or terrestial), certain parts of ergonomics,
- etc. Why? Because they are quantitative. They use stereo in some instances
- (far more important than most people realize). USGS tours are available.
-
- Maps have better information content than any image pervading our society.
- The signal to noise ratio is greater (density). Better than photos,
- better than movies (ask yourself if you can always figure out the ending 8^).
- I defy the presentation of an other consistent image with better
- characteristics than a map. Maps have excellent characteristics like
- an easily measurable geometry, legends, symbolization (but like all imagery
- they have limitations). Consider all this the next time you look at your AAA
- maps when you go on vacation.
-
- What kinds of quantitative, numeric support are needed? Every basic science
- measurement:
- enumeration (counting, math got started because of counting), distances,
- areas, volumes, angles (planar and solid), extrema,
- parametric and non-parametric statistics (means, median, modes,
- deviations, ANOVA), histograms, intervals and error bounds, derivatives,
- partials, integrals, etc.
-
- ONLY the trained researcher (maybe you) will make the critical insights
- needed for scientific discovery. Not your programmer,
- not your Renaissance Team.
- We are not talking EdVis or PresentationVis, we are talking
- HackerVis/NerdVis/DeepDownAndDirtyViz. We can't do it for you.
- You the researcher have the eyes. Only you can make the discovery:
- to see differences where your artist, your programmer, your cognition expert
- can't, and to see similarity where the average man can't.
-
- Miya's Suggestion: Never view an image or film, too fast. You should control
- the rate at which you observe. Use tools if you have to: hand lenses, filters,
- etc. If you are forced to view something too fast, jump up and say:
- "Wait, just one damn minute!"
- Bob Sharp (Emeritus, Caltech Div. of Geog. and Planetary Sciences) presents
- an Austin Post photo in one book and asserts that this single photo (of Denali)
- is adequate for a 1 hour lecture on glaciology. That's quite a claim (an
- impressive photo). Artificial data images have yet to assert that kind of
- information density (it's not clear they should, but these are opinions).
- This should be considered an implicit challenge for visualizations to get
- that important for discovery. Sometimes, some fields pour days, weeks, and
- months trying to understand (interpret) an image.
-
- Miya's Gross Generalization: Scientists like grided graph paper (and tabular
- papers) like many artists (painters) like starting with a blank canvas
- (exceptions always locatable).
- Frames of reference are needed badly. Include everything a good map has:
- 1) A Scale, 2) a legend (both geometric and any symbology like color or
- glyps or icons, whatever). Beware of perspective. $Billion$ are spent
- yearly to remove perspective from photographic imagery.
-
- Miya's Guess: the biologists will figure this all out before the physicists,
- chemists, and others. Others should attempt to prove this wrong.
- Good luck guys. 8^)
-
- Other inspirations: Muybridge and Edgerton.
- Add your own.
- Muybridge did his basic research at Stanford and Penn State.
- His work went on to become the motion picture industry, ergonomics,
- system analysis (time motion studies). Edgerton is best known
- for his work on the strobe, super-fast and time lapse photography,
- and side-scanning sonar.
-
- Hints on Design from Don Norman -- used with permission
- ("Turn Signals are the Facial Expressions of Automobiles")
-
- A challenge to the designers of the world:
- Make signs unnecessary.
- Think of the Four-Questions test and generalize to systems.
- Norman originally wrote this test for kitchen appliances, but it generalizes
- well to scientific computer systems
- Ouestion one: Where would we store it?
- [Consider disk space as well as foot print.]
-
- Ouestion two: Where would we use it?
- [Left to you.]
-
- Ouestion three: Where would we plug it in?
- [Consider more ways that power.]
-
- Ouestion four: How much work would it be to clean?
- [A question of maintenance.]
-
- Generalize additional important questions:
-
- Robert Lucky notes the qualities of pictures in Silicon Dreams (pp. 292):
-
- describing spatial relationships
- showing the structure of data
- allowing pattern matching approaches to problem solving
- getting attention
- describing and identifying people
- invoking esthetic appreciation
-
- This boils down largely to "geometry."
-
- The problems:
- Hidden object elimination (obscured features)
- Optical illusions (leading to false interpretations, e.g. Necker cubes)
- Inadvertant data corruption
- Parallax and perspective in 3-D and higher D.
- Performance
-
- Science differs from art in that we have to validate our simulations and
- theory. Right now, support for this validation is especially lacking.
- Empirical/experimental techniques make simulation validation difficult,
- in the works of Eduard Imhof speaking about maps:
-
- Chap. 16 page 359.
- 7. On art in cartography
-
- The means of cartographical expression are subject to the same experiences
- and visual aesthetic rules as every other type of graphic product. *Art*
- however, is the highest level attainable in graphical work. Thus, a good map
- cannot lack an artistic touch.
- There has already been much debate and writing on the question of whether
- cartography has anything to do with art and if so, how much. We must try to
- remain in the clear on this topic and avoid exaggeration and cliche. Certainly
- it is not a function of cartography to create art in the higher sense of the
- word: the cartographer has scarcely the opportunity of doing so. Art
- presupposed the widest ranging freedom of form and structure, whereas
- cartographers are confined to the smallest details by topographical survey,
- statistical figures, by standardization of symbolism and color, and by what
- is essentially a non-artistic purpose. On the other hand, however, the
- following facts are clearly established; we demand of it a balanced
- expression which emphasizes the significant and subdues the insignificant;
- amd we demand a well balance, harmonious interplay of all elements contained.
- It is in accordance with practical experience, however, which the author has
- personally observed over many decades, that in cartographic affairs, as in
- all graphic work, the greatest clarity, the greatest power of expression,
- balance and simplicity are concurrent with beauty. To create beauty, a
- purely technical, practical arrangement of things is not sufficient. Beauty
- is, to a large extent, irrational. Artistic talent, aesthetic sensitivity,
- sense of proportion, of harmony, of form and color, and of graphical
- interplay are indispensible to the creation of a beautiful map and thus to a
- clear expressive map.
-
-
- Systems
- =======
-
- StereoGraphics Corporation
- 2171 East San Francisco Blvd.
- San Rafael, CA 94901
- ph: (415) 459 4500
- fax: (415) 459 3020
-
- NCAR
- ----
- National Center for Atmospheric Research
- One of the original graphics packages.
- Platforms:
- Sun, RS6000, SGI, VAX, Cray Y-MP, DecStations, and more.
- Availability:
-
- Contact:
- scdinfo@ncar.ucar.edu
- (303)-497-1201
-
- Cost: .edu
- $750 Unlimited users
-
- .gov
- $750 1 user
- $1500 5 user
- $3000 25 user
-
- .com users multiply .gov * 2.0
-
-
- MOVIE.BYU
- ---------
- See also Cquel.byu
- CQUEL.BYU (pronounced "sequel") is a brand new modelling and
- visualization package for the UNIX workstation. Some of it's features
- include: animation, raytracing, scientific visualization, interactive
- modelling and editing, quadric primitives, Bezier and NURBS surfaces,
- constructive solid geometry, texture mapping, graphical user
- interface, and free-form deformation to name a few.
-
- Platforms: SUN, DEC, HP, SGI, IBM RS6000, others,
-
- Availability:
- Cquel.byu
- 30-day trial period w/o obligation
-
- Contact:
- Engineering Computer Graphics Laboratory
- Brigham Young University
- 368 Clyde Building
- Provo, UT 84602
- PHONE: 801-378-2812
- E-Mail: cquel@byu.edu
-
- Cost:
- $20 for 30-day trial period w/o obligation
- $1,500 for a license (exec. code, etc.)
-
- PLOT3D
- ------
-
- Platforms:
- Availability:
- Contact:
- Cost:
-
- apE III
- ---
- Platforms:
- Availability:
- Contact:
-
- TaraVisual Corporation
- 929 Harrison Avenue
- Columbus, OH 43215
- Tel. (614) 291-2912 and 1-800-458-8731
- Fax (614) 291-2867
-
- Cost:
- $895 (plus tax); runtime version with a site-license for a single user
- (at a time), no limit on the number of machines in a cluster.
- $895 includes support/maintenance and upgrades.
- Source code more. Additional user licenses $360.
-
- AVS
- ---
-
- See also:
- comp.graphics.avs
-
- Platforms: CONVEX, CRAY, DEC, Evans & Sutherland, HP, IBM, Kubota,
- Set Technologies, SGI, Stardent, SUN, Wavetracer
- Availability: AVS4 available on all the above:
- for all UNIX workstations
- Contact:
- Advanced Visual Systems Inc.
- 300 Fifth Ave.
- Waltham, MA 02154
-
- (617)-890-4300 Telephone
- (617)-890-8287 Fax
- avs@avs.com Email
-
- Advanced Visual Systems Inc. for: CRAY, HP, IBM, SGI,
- Stardent, SUN
- Advanced Visual Systems Inc. or CRAY for CRAY
- CONVEX for CONVEX
- DEC for DEC
- Evans & Sutherland for Evans & Sutherland
- Advanced Visual Systems Inc. or IBM for IBM
- Kubota Pacfic Inc. for Kubota
- Set Technologies for Set Technologies
- Wavetracer for Wavetracer
-
- See also: comp.graphics.avs
- FTP Site: for modules, data sets, other info:
- avs.ncsc.org (128.109.178.23)
- Cost:
-
-
- SGI Iris Explorer
- -----------------
- See also:
- comp.sys.sgi
- comp.graphics.explorer
- Platforms: SGI IRIS, Cray Y-MP, Cray 2, others in progress
- Availability: Available now on SGI, Summer '92 for Cray
- Contact: SGI for IRIS version, Cray for Cray version
- Cost: Bundled on new IRIS systems (not sure of Cray license).
-
- The explorer ftp site is :
-
- ftp.epcc.ed.ac.uk which is housed at Edinburgh Parallel Computing Centre.
- The administrator is Gordon Cameron (my office mate).
-
- The mirror address stateside is swedishchef.lerc.nasa.gov
-
-
- Visual3
- -------
- Platforms:
- Availability:
- Contact:
- contact Robert Haimes, MIT
- Cost:
-
- FieldView
- ---------
- Platforms:
- Availability:
- Contact:
- Intelligent Light Corp.
- Cost:
-
- VIS-5D
- ------
- a system for visually exploring the output of weather
- models and similar data sets.
-
- SGI Power/VGX, Power/GTX, PI, Crimson and Indigo;
- IBM RS/6000 with GL graphics;
- Stardent GS-1000 and GS-2000
-
- Availability:
- ftp vis5d.ssec.wisc.edu (or ftp 144.92.108.66)
-
- Login as anonymous and send your id as the password
- ftp> cd pub/vis5d
- ftp> ascii
- ftp> get README
- ftp> bye
-
- Read section 2 of the README file for full instructions
- on how to get and install VIS-5D.
-
- Cost: freeware (thanks to NASA for supporting the development)
-
- Contact:
- Bill Hibbard (whibbard@vms.macc.wisc.edu)
- Brian Paul (bpaul@vms.macc.wisc.edu)
-
-
- IBM Data Explorer
- -----------------
-
- Currently available on: IBM Risc System 6000,
- IBM POWER Visualization Server (32 i860, 40 MHz)
-
- Working on (announced) : SGI, HP, Sun
-
- Contact:
- Your local IBM Rep. For a trial package ask your rep to contact :
-
- David Kilgore
- Data Explorer Product Marketing
- YKTVMH(KILCORE), (708) 981-4510
-
- Cost:
-
- Khoros 1.0 Patch 5
- ------------------
- See also: comp.soft-sys.khoros
-
- Platforms: Sun, SGI, DEC, HP, IBM, NeXT, Convex and others
-
- Availability: Available now on all platforms.
-
- Contact: The Khoros Group
- Room 110 EECE Dept.
- University of New Mexico
- Albuquerque, NM 87131
-
- Email: khoros-request@chama.eece.unm.edu
-
- See also: comp.soft-sys.khoros
-
- FTP Site: The Khoros system and user contributed code available
- via anonymous ftp from pprg.eece.unm.edu [129.24.24.10]
- in /pub/khoros
-
- Before installing Khoros, retrieve the file
- /pub/khoros/release/install.ftp
-
- Precompiled binaries are available for Sun (sparc),
- SGI and DEC (mips) architectures.
-
- A tape and printed copies of the documentation can
- be obtained from the Contact address above, for $250
-
- Spyglass Dicer
- ------------------
- 3D volumetric data analysis package
-
- Platform: Mac
-
- Availability: now shipping
-
- Contact:
- Spyglass, Inc.
- P.O. Box 6388
- Champaign, IL 61826
- (217) 355-6000
-
- Cost:
-
- Spyglass Transform
- ------------------
- 2D data analysis package
-
- Platforms: Mac, SGI, Sun, DEC, HP, IBM
-
- Availability:
- HP and IBM: September 92
- Others: now shipping
-
- Contact:
- Spyglass, Inc.
- P.O. Box 6388
- Champaign, IL 61826
- (217) 355-6000
- Cost:
-
- Data Visualizer
- ---------------
-
- Platforms: SGI, SUN, IBM RS6000, HP, DEC
-
- Availability:
- Available on all the above platforms from Wavefront
- Technologies. Educational programs and site licenses are
- available.
-
- Contacts:
- Mike Wilson (mike@wti.com)
-
- Wavefront Technologies, Inc.
- 530 East Montecito Street
- Santa Barbara, CA 93103
- 805-962-8117
- FAX: 805-963-0410
-
- Wavefront Europe
- Guldenspoorstraat 21-23
- B-9000 Gent, Belgium
- 32-91-25-45-55
- FAX: 32-91-23-44-56
-
- Wavefront Technologies Japan
- 17F Shinjuku-sumitomo Bldg
- 2-6-1 Nishi-shinjuku, Shunjuku-Ku
- Tokyo 168 Japan
- 81-3-3342-7330
- FAX 81-3-3342-7353
-
- National Center for Supercomputing Applications (NCSA) Tool Suite
- -----------------------------------------------------------------
-
- Platforms: Unix Workstations (DEC, IBM, SGI, Sun)
- Apple MacIntosh
- Cray supercomputers
-
- Availability: Now available. Source code in the public domain.
- FTP from ftp.ncsa.uiuc.edu.
-
- Contact: National Center for Supercomputing Applications
- Computing Applications Building
- 605 E. Springfield Ave.
- Champaign, IL 61820
-
- Cost: Free (zero dollars).
-
- The suite includes tools for 2D image and 3D scene analysis and visualization.
- The code is actively maintained and updated.
-
- WIT
- ---
-
- WIT - commercial image processing package with a visual programming
- interface, a product of Logical Vision. Provided for use on the Catalyst
- CDware program as trial software; demo version on Sun CDware 4.
-
- Platforms: Sun3, Sun4, vxWorks by Wind River Systems, and
- Datacube (MaxVideo-20 hardware) platforms.
- Special hardware:
- 12 Mb. of memory and color monitor suggested Special software:
- OpenWindows or X Window system
-
- Cost: WIT for Sparc, one yr. free upgrades, 30 days technical support $5000 US
- Academic institutions: discounts available
- Currently sending free 3.5" demo disks for Sun Sparcstation.
-
- Contact:
- Logical Vision, Ltd.
- 6882 Rupert St.
- Vancouver, B.C., Canada
- V5S 2Z6
- Tel: 604-435-2587, Fax: 604-299-8263
- Terry Arden <poon@ee.ubc.ca>
-
- VoxelBox
- -------------------
- A 3D Volume renderer for Windows. Features include direct
- ray-traced volume rendering, color and alpha mapping,
- gradient lighting, animation, reflections and shadows.
-
- Platform: Windows 3.x on a PC(386 or higher) with at least
- an 8 bit video card(SVGA is fine)
-
- Availability: now shipping
-
- Contact:
- Jaguar Software Inc.
- 573 Main St., Suite 9B
- Winchester, MA 01890
- (617) 729-3659
- jwp@world.std.com (john w poduska)
-
- Cost: $495
-
-
- others
-
-
- Issue/problems
- --------------
-
-
- How to get more quantitative systems?
-
-
- Employment:
- Job postings (resumes or offerings) are encouraged, BUT please use your
- news software appropriately. The best way to post is cross post
- comp.graphics.visualization,misc.jobs.offered (or resumes). (No spaces between
- newsgroups. Then fill the Followup-To: field with "poster."
- Please read the misc.jobs.offered (or resumes) FAQ (posted twice monthly) for
- stylistic considerations BEFORE POSTING.
-
-
- Netiquette
- ----------
-
- We assume you have read news.announce.newusers and that you understand
- network informalities. This group is not moderated, and this is one
- experiment in self-moderation (education).
-
- If you have questions, ask you system administrator. If you are the system
- administrator, use MAIL, and ask your net neighbors.
-
- Do not post TESTS here. Special testing groups exist to acknowledge your
- posts. Test in misc.test, or in your locale: e.g., ba.test, ca.test, na.test,
- etc.
-
- Some people believe the charter should be posted. The name of the group
- should sufficiently convey the purpose of this group.
-
- Flame wars: 1) Flame using mail. Failing that 2) Cut down on the number
- of groups in your Newsgroups: line. 3) Use Followup-To: a line with
- fewer newsgroups. Make certain you read all posts before responding, the net
- is asynchronous enough as it is: the History of Dumb posts includes such
- titles as
- "What time is it?" "The Space Shuttle blew up!" and "California just had an
- earthquake." See your local broadcast news.
-
- Attribution: (Those lines frequently beginning with ">") MINIMIZE.
- Especially: don't post "Me, too" posts after 100 lines of attribution.
- Remove especially long sigatures at the bottoms of posts.
- Use email. Show that you are intelligent and net savvy in your postings.
- Edit carefully.
-
- DO NOT BOTHER TO ASK FOR PROPRIETARY or pre-release of scientific data.
- Many organizations and individuals involved in scientific research are
- given a lean (90 day, 1 year, several years). This is sometimes akin
- to asking for trade secrets. Don't bother.
-
- Posting ads: Rules do not specifically prevent posting advertising so long
- as it is done is good taste. The specific prohibitions come from specific
- hosts such as those from the original Internet: machines funded by
- US Government monies. These machines are not to be used for personal gain
- or profit. Specific criminal problems won't be elaborated here for space.
- If in doubt, ask someone first.
-
- General graphics references can be found in comp.graphics.
- This is the place to ask more general questions like graphics formats.
- There, an FAQ will soon exist. An electronic references
- server daemon is also under work as well.
- Hardware specific questions like IBM PC or SGI or SUN, etc. specific questions
- are probably best answered in groups specific oriented to those machines.
-
- Because this group is unmoderated, it is open to posts which call for
- pyramid schemes, calls to send postcards to sick children, and other posts.
- 1) Ignore those.
- 2) Flame the poster via email.
- 3) Use the Followup-To: line redirecting out of the group (net.akido)
- after one cross-post in the group.
- That is the price of free speech as ruled in the United States.
- The general feeling is that c.g.v. should be more oriented to that
- mystical thing called visualization.
-
-
- References
- ==========
-
- Other useful newsgroups
- -----------------------
- comp.sys.sun
- comp.graphics.avs
- comp.sys.sgi
- comp.infosystems.gis
- comp.graphics
- sci.image.processing
-
- Books
- -----
-
- Convert to refer:
- E. Tufte, The Visual Display of Quantitative Information
- Cleveland, William: "The Elements of Graphing Data" Wadsworth Advanced
- Books and Software.
-
- Tukey, John: "Exploratory Data Analysis"
- Addision Weseley, pub.
-
- "Graphics and Graphic Information Processing" - Translated by William J.
- Berg and Paul Scott,
- Walter De Gruyter, Publisher.
-
- %A Edward Huff
- %T How to Lie with Statistics
-
- %A Mark Monmonier
- %T How to Lie with Maps
- %I Univ. of Chicago Press
- %C Chicago
- %D 1991
- %X Ch. 2 Elements of the Map
- Ch. 3 Map Generalizations: Little White Lies and Lots of Them
- Ch. 4 Blunders that Mislead
- Ch. 5 Maps that Advertise
- Ch. 6 Development Maps (or, How to Seduce the Town Board)
- Ch. 7 Maps for Political Propaganda
- Ch. 8 Maps, Defense, and Disinformation: Fool Thine Enemy
- Ch. 9 Data Maps: Making Nonsense of the Census
- Ch. 10: Color: Attraction and Distraction
-
- Jacques Bertin's "The Semiology of Graphics" ?
- - it's what Tufte should have been (although it predates both books).
-
- @book{Earnshaw:92,
- editor = {Earnshaw, R.A. and Wiseman, N.},
- title = {An Introductory Guide to Scientific Visualization},
- publisher = {Springer-Verlag},
- year = 1992,
- month = {September},
- note = {ISBN 3-540-54664-2, ISBN 0-387-54664-2}
- }
-
- @book{Brodlie:92,
- editor = {Brodlie, K.W. and Carpenter, L.A. and
- Earnshaw, R.A. and Gallop, J.R. and
- Hubbold, R.J. and Mumford, A.M. and
- Osland, C.D. and Quarendon, P.},
- title = {Scientific Visualization ---
- Techniques and Applications},
- publisher = {Springer-Verlag},
- year = 1992,
- month = {January},
- note = {ISBN 3-540-54565-4, ISBN 0-387-54565-4}
- }
-
-
- Better than average papers
-
- @INPROCEEDINGS{Insel90a,
- AUTHOR = "Alfred Inselberg and Bernard Dimsdale",
- TITLE = "Parallel Coordinates: A Tool for Visualizing
- Multi-dimensional Geometry",
- BOOKTITLE = "Proceedings of the First IEEE Conference on
- Visualization, San Francisco, 23-26 October 1990",
- EDITOR = "Arie Kaufman",
- PUBLISHER = "IEEE Computer Society Press",
- PAGES = "361-377",
- YEAR = 1990}
-
- Journals
- --------
-
- IEEE Computer Graphics & Applications
-
- ACM Transactions on Graphics
-
- The Journal of Visualization and Computer Animation
- published by John Wiley & Sons Ltd, ISSN 1049-8907
-
- Scientific Programming: A Wiley-Interscience Publication
- Subscription:
- In the US:
- Scientific Programming: A Wiley-Interscience Publication
- John Wiley and Sons
- Periodicals Division
- P.O. Box 7247-8491
- Philadelphia, PA 19170-8491
- Outside the US:
- Scientific Programming: A Wiley-Interscience Publication
- John Wiley and Sons
- Journals Administration Dept.
- Baffins Lane, Chichester
- Sussex PO19 1UD
- England
-
-
- Magazines
- ---------
-
- Pixel
-
- Conferences & workshops (see also the proceedings from years passed):
- ---------------------------------------------------------------------
-
- Visualization '9x - Annual visualization conference
- SIGGRAPH - Annual ACM graphics conference
- Eurographics '9x - Annual European graphics conference of the
- Eurographics association
-
- "less than annual" Conferences
- ------------------------------
-
- Symposium on Interactive 3D Graphics
- Volume Visualization Workshop
- Usenix Graphics Workshop
-
-
- Contributions
- =============
-
- Mail it to me (amelia). I prefer concise text which can just be concatenated
- into this file. No long winded speeches please. I'm just a computer.
-
- "Take me I'm yours....."
-
- ======TAG LINE=====
-
-
- From: Nick (Nikolaos) C Fotis <nfotis@theseas.ntua.gr>
-
- Hello, here's the latest version of my SciVi and Mol. Vis. stuff
- (minus + and # signs). Basically, I got your latest updates and I
- incorporated them here:
-
-
- 17. Scientific visualization stuff
- ----------------------------------
-
- a. NCSA Data Slice (xds): Bundled with the X11 distribution from MIT,
- in the contrib directory. Available at ftp.ncsa.uiuc.edu [141.142.20.50]
- (either as a source or binaries for various platforms).
- This site has *lot* of Visualization tools. You're advised to look at it.
-
- b. KHOROS : available via anonymous ftp at pprg.eece.unm.edu (129.24.24.10).
- cd to /pub/khoros to see what is available. It is HUGE (> 100 MB), but good.
- Needs Unix and X11R4. Freely copied (NOT PD), complete with sources
- and docs. Very extensive and at its heart is visual programming.
- Khoros components include a visual programming language, code
- generators for extending the visual language and adding new application
- packages to the system, an interactive user interface editor, an
- interactive image display package, an extensive library of image and
- signal processing routines, and 2D/3D plotting packages.
-
- See comp.soft-sys.khoros on Usenet for more info....
-
- c. MacPhase : Analysis & Visualization Application for the Macintosh.
- Operates on 1D and 2D data arrays. Import/Export several different file
- formats. Several different plotting options such as gray scale,
- color raster, 3D Wire frame, 3D surface, contour, vector, line, and
- combinations. FFTs, filtering, and other math functions, color look up
- editor, array calculator, etc. Shareware, available via anonymous ftp from
- sumex-aim.stanford.edu in the info-mac/app directory.
- For other information contact Doug Norton (e-mail: 74017.461@@compuserve.com)
-
- d. IRIS Explorer is an application creation system developed by Silicon
- Graphics that provides visualisation and analysis functionality for
- computational scientists, engineers and other scientists. The Explorer
- GUI allows users to build custom applications without having to write
- any, or a minimal amount of, traditonal code. Also, existing code can
- be easily integrated into the Explorer environment. Explorer currently
- is available on SGI and Cray machines, but will become available on
- other platforms in time. [ Bundled with every new SGI machine, as far as
- I know]
-
- See comp.graphics.explorer for discussion of the package.
-
- e. apE. Back in the 'old good days', you could get apE for nearly free.
- Now has gone commercial and the following vendor supplies it:
-
- TaraVisual Corporation
- 929 Harrison Avenue
- Columbus, Ohio 43215
- Tel: 1-800-458-8731 and (614) 291-2912
- Fax: (614) 291-2867
-
- Cost:
- $895 (plus tax); runtime version with a site-license for a single user
- (at a time), no limit on the number of machines in a cluster.
- $895 includes support/maintenance and upgrades.
- Source code more. Additional user licenses $360.
- The name of the package has become apE III (TM).
- Khoros is very similar to apE on philosophy, as are AVS and Explorer.
-
- f. AVS
- See also:
- comp.graphics.avs
-
- Platforms: CONVEX, CRAY, DEC, Evans & Sutherland, HP, IBM, Kubota,
- Set Technologies, SGI, Stardent, SUN, Wavetracer
- Availability: AVS3 available on all the above:
- AVS4 currently available on SGI, SUN
- AVS4 will be available on: HP, IBM, Kubota, SGI, Stardent, SUN
- 6/1/92
-
- Contact:
- Advanced Visual Systems Inc. for: CRAY, HP, IBM, SGI,
- Stardent, SUN
- CONVEX for CONVEX
- Advanced Visual Systems Inc. or CRAY for CRAY
- DEC for DEC
- Evans & Sutherland for Evans & Sutherland
- Advanced Visual Systems Inc. or IBM for IBM
- Kubota Pacfic Inc. for Kubota
- Set Technologies for Set Technologies
- Wavetracer for Wavetracer
-
-
- i. Wavefront products.
-
- j. PLOT3D and FAST from NASA Ames. These packages are distributed from
- COSMIC at least (for FAST ask Pat Elson <pelson@nas.nasa.gov> for
- distribution information). In general, these codes are for US
- citizens only :-(
-
- k. XGRAPH : On the contrib tape of X11R5. It specialty is display of up
- to 64 data sets (2D).
-
-
- ==========================================================================
-
- 18. Molecular visualization stuff
- ---------------------------------
-
- [ Based on a list from cristy@dupont.com < Cristy > , which asked for
- systems for displaying Molecular Dynamics, MD for short ]
-
- a. Flex is a public domain package written by Michael Pique, at The Scripps
- Research Institute, La Jolla, CA. Flex is stored as a compressed,
- tar'ed archive (about 3.4MB) at perutz.scripps.edu [137.131.152.27], in
- pub/flex. It displays molecular models and MD trajectories.
-
- b. MacMolecule (for Macintosh). I searched with Archie, and the most
- promising place is sumex-aim.stanford.edu (info-mac/app, and
- info-mac/art/qt for a demo)
-
- c. If you are running on an SGI, try MD-DISPLAY, from Terry
- Lybrand (lybrand@milton.u.washington.edu).
-
- d. Duncan McRee <dem@scripps.edu> has something called XtalView. It is a
- crystallography package that does visualize molecules and much more.
- It uses the XView toolkit.
-
- e. landman@hal.physics.wayne.edu:
-
- I am writing my own visualization code right now. I look at MD output
- (a specific format, easy to alter for the subroutine) on PC's. My
- program has hooks into GKS. If your friend has access to Phigs for X
- (PEX) and fortran bindings, I would be happy to share my evolving code
- (free of charge). Right now it can display supercells of up to 65
- atoms (easy to change), and up to 100 time steps, drawing nearest
- neighbor bonds between 2 defining nn radii. It works acceptably fast
- on a 10Mhz 286.
-
- f. icsg0001@caesar.cs.montana.edu:
-
- I did a project on Molecular Visualization for my Master's Thesis, using
- UNIX/X11/Motif which generates a simple point and space-filling model.
-
- g. KGNGRAF by IBM.
-
- h. ditolla@itnsg1.cineca.it:
-
- I'm working on molecular dynamic too. A friend of mine and I have
- developed a program to display an MD run dynamically on Silicon
- Graphics. We are working to improve it, but it doesn't work under X,
- we are using the graphi. lib. of the Silicon Gr. because they are much
- faster then X. When we'll end it we'll post on the news info about
- where to get it with ftp. (Will be free software).
-
- i. XBall V2.0: written by David Nedde. Call daven@maxine.wpi.edu.
-
- j. XMol: an X Window System program that uses OSF/Motif for the
- display and analysis of molecular model data. Data from several
- common file formats can be read and written; current formats include:
- Alchemy, CHEMLAB-II, Gaussian, MOLSIM, MOPAC, PDB, and MSCI's XYZ
- format (which has been designed for simplicity in translating to
- and from other formats). XMol also allows for conversion between
- several of these formats.
- Xmol is available as ftp.msc.edu:pub/xmol/xmol.tar
-
- k. INSIGHT II from BIOSYM Technologies Inc.
-
- l. SCARECROW. The program has been published in J. Molecular Graphics 10
- (1992) 33. The program can analyze and display CHARMM, DISCOVER, YASP
- and MUMOD trajectories. The program package contains also software for
- the generation of probe surfaces, proton affinity
- surfaces and molecular orbitals from an extended Huckel program.
- It works on Silicon Graphics machines.
- Contact Leif Laaksonen <Leif.Laaksonen@csc.fi or laaksone@csc.fi>
-
- [ I would also suggest looking at least in SGI's Applications Directory.
- It contains many more packages - nfotis ]
-
- ==========================================================================
-
-
- Article 9 of comp.graphics.explorer:
- From: tohanson@gonzo.lerc.nasa.gov (Jeff Hanson)
- Subject: FAQ for Explorer, slightly dated
-
- Here is the currect FAQ for Explorer. Note that it is slightly dated
- since it does not reflect the existance of this news group. I'm sure
- Gordon will soon generate a new FAQ and post it here.
-
- oOo Explorer Frequently Asked Question List oOo
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Version 0.2
-
- Last Altered 12th April 1992 - G.C.
-
- !!!!! Please Redistribute this Article !!!!!!
-
- + Introduction +
- ~~~~~~~~~~~~~~~~
-
- This document contains answers to some Frequently Asked Questions (FAQs)
- asked of the Explorer Modular Visualisation Environment (MVE).
-
- The latest update of this can always be obtained by FTP from :
- UK Site : ftp.epcc.ed.ac.uk (129.215.56.29)
- ( US Mirror : swedishchef.lerc.nasa.gov (139.88.54.33) )
-
- If you wish to be part of the Explorer mailing list, comment on this
- FAQ, add/alter/CORRECT any questions, or have any suggestions, please
- email:
- explorer-request@castle.ed.ac.uk, or
- gordonc@epcc.ed.ac.uk
-
- Where relevant and possible, the sources of information are listed after
- the answers - many of the questions stem from those on the mailing
- list. Direct quotes are indented.
-
- N.B. The compilers of this FAQ are independent of SGI (developers of
- Explorer) - this also means that any inaccuracies are most probably our
- own faults ! Thanks to the XUG and the X FAQ for ideas.
- - Gordon Cameron (Edinburgh Parallel Computing Centre)
- gordonc@epcc.ed.ac.uk
- - Chris Thornborrow, Matthew White (EPCC)
-
- Key :
- ~~~~~
- + : New since last update
- * : Changed since last update
- @ : Bug question (+ fix)
-
- + Topics +
- ~~~~~~~~~~
- A) TOPIC: GENERAL INFORMATION
- A.1) What is Explorer ?
- A.2) What platforms will Explorer run on/what are the requirements ?
- A.3) How can I get Explorer ?
- A.4) Modules, Maps & Ports - What are they ?
- A.5) What is the Map Editor/Librarian ?
- A.6) What Data Formats can Explorer handle ?
- A.7) What is the Data Scribe ?
- A.8) What is the Module Builder ?
- A.9) What are the MCW and MDW ?
- A.10) What is an MVE ?
- A.11) What other MVEs are there ?
- A.12) Is there any overlap between ImageVision and Explorer ?
- -
- B) TOPIC: RUNNING EXPLORER
- B.1) Why does Explorer crash immediately ? +
- B.2) Can I run Explorer on one machine and display on another ?
- B.3) Can I run modules on different machines ?
- B.4) How can I start Explorer with a prefined map ?
- B.5) Can I run Explorer in batch mode (i.e. without the GUI) ?
- B.6) Will Explorer work with very large data sets ?
- B.7) When does a module fire ?
- B.8) Why does Explorer run slowly on my system ?
- B.9) How can I customize the look of Explorer ?
- -
- C) TOPIC: USING EXPLORER with the MAP EDITOR
- C.1) Why does Explorer ignore all my input ? @
- C.2) Why can't I start a GenerateColormap module ?
- C.3) How can I stretch the librarian scrolling list ?
- C.4) How can I slice into an iso-surface ?
- C.5) How can I render translucent solids ?
- C.6) Why can I not get LatFunction to work ? +@
- -
- D) TOPIC: USING THE DATASCRIBE
- D.1) Why does the help file not reflect the actual widget ? @
- -
- E) TOPIC: USING THE MODULE BUILDER
- -
- F) TOPIC: PROGRAMMING MODULES
- F.1) How can I wake Explorer on events ?
- F.2) What has happened to the routine cxInputPortStateGet ? @
- -
- G) TOPIC: MODULES AVAILABLE/WANTED
- G.1) Where can I get PD modules ? +
- -
- H) TOPIC: FURTHER INFORMATION
- H.1) Where can I obtain documentation (e.g. Module Writers' Guide) ? *
- H.2) Is there a mailing list/FTP site ? *
- H.3) Is there a relevant newsgroup ?
- H.4) Why are the electronic PostScript files incomplete ? *
- -
- I) TOPIC: MISCELLANEOUS
- I.1) How can I add/correct or comment on Q&As on the FAQ ?
- I.2) Where can I find a list of bugs ? +
- -
-
- + Full Q&As +
- ~~~~~~~~~~~~~
- ======================================================================
- A) TOPIC: GENERAL INFORMATION
- ======================================================================
- A.1) What is Explorer ?
-
- IRIS Explorer is an application creation system and user
- environment that provides visualisation and analysis
- functionality for computational scientists, engineers, and
- other investigators. It is especially useful for those whose
- needs are not met by commercial software packages. Also, IRIS
- Explorer's Graphical User Interface (GUI) allows users to build
- custom applications without having to write a single line of
- code.
-
- [from IRIS EXPLORER - Technical Report(SGI)]
- ----------------------------------------------------------------------
- A.2) What platforms will Explorer run on/what are the requirements ?
-
- Explorer is included at no cost with each Silicon Graphics
- workstation. Explorer can be ordered for existing workstations at a
- nominal media charge. It is also available from Cray Research for Cray
- Research computers, and it is hinted that the package will be ported
- soon(#:-} to other platforms.
-
- On SGI platforms, requirements are that the machine have a 24 bit plane
- (or virtual 24 bit plane) frame buffer i.e. All except Personal Irises
- with 8 bit planes. In addition, 16MB is the minimum memory requirement,
- although 24 megs is recommended, especially when the data sets to be
- visualised are particularly large.
-
- In particular, you must be running version 4.0.1 of the OS, or higher.
-
- [Leo Blume(SGI) and Release Notes for Explorer]
- ----------------------------------------------------------------------
- A.3) How can I get Explorer ?
-
- Contact your local SGI supplier for details of what Explorer is available
- on, and how to obtain it.
- ----------------------------------------------------------------------
- A.4) Modules, Maps & Ports - What are they ?
-
- A MODULE is a single software tool for performing a particular task.
- Explorer is shipped along with a wide range of modules to perform tasks
- such as data input, rendering, image processing and manipulation. Each
- module has associated input and output PORTS which control the flow of
- data in and out of the module.
-
- Modules are connected together to form pipelines which perform specific
- higher level tasks. The collection of such modules and the links between
- them are referred to as Explorer MAPS. The function of the map is implicitly
- defined by the functions of the modules and their interconnectivity.
- ----------------------------------------------------------------------
- A.5) What is the Map Editor/Librarian ?
-
- The Map Editor and Librarian are the two main windows that are used
- when you use Explorer.
-
- The MAP EDITOR is a graphical tool for assembling the maps by picking
- modules and joining them together in an intuitive manner. The editor
- will only allow the connection of input/output port pairs of the same
- data type, so Explorer is a `strongly typed system'. The map editor is
- effectively the interactive prototyping environment of Explorer.
-
- The LIBRARIAN is the tool which allows you to browse through existing
- modules and maps, to choose those which you wish to use with the map
- editor.
- ----------------------------------------------------------------------
- A.6) What Data Formats can Explorer handle ?
-
- Explorer works on 5 main types of data :
- Parameter : Scalar values such as integers and doubles.
- Lattice : A Generalized multi-dimensional array.
- Pyramid : Combines lattices with connectivity information in
- a hierarchical structure.
- Geometry: A general, hierarchical, geometric description.
- Unknown : An uninterpreted stream of bytes
-
- The first four types will be consistent between modules perhaps
- executing on different machine architectures, whereas the last unknown
- type does not have this feature (unless the user adds XDR-like data
- conversion him/herself).
- ----------------------------------------------------------------------
- A.7) What is the Data Scribe ?
-
- The DataScribe is a graphical utility to allow the user to build
- templates which can convert data between formats - this is typically
- used to convert a customized user data file into a lattice(say) and
- vice versa.
-
- These data conversion templates, when completed, constitute modules in
- Explorer which can be used in the same fashion as any other module.
- ----------------------------------------------------------------------
- A.8) What is the Module Builder ?
-
- The Module Builder is a graphical utility to aid in the creation of
- Explorer modules, by helping you define which data types the module has
- on its input and output ports, which widgets correspond to which
- parameters, and how the module will look when placed in the Map
- Editor.
-
- The Module Builder can also automatically generate one of the extra
- layers of wrapping around the core function, namely the Module Data
- Wrapper (MDW).
- ----------------------------------------------------------------------
- A.9) What are the MCW and MDW ?
-
- The innermost layer of an Explorer module is the computational
- algorithm which provides the base functionality. This is surrounded
- first by the Module Data Wrapper (MDW) - which can be generated
- automatically by the Module Builder - and this performs the conversion
- of data from Explorer format at ports to the algorithm's internal
- format, and vice versa.
-
- The outermost layer is the Module Control Wrapper (MCW) which is the layer
- responsible for communicating the module's input and output (Explorer)
- data with other modules, and maintaining data consistency (a la XDR).
- This layer also handles comms with the local controller and the firing
- mechanism.
-
- The MCW is necessary whereas the MDW may be bypassed by the programmer
- if desired, allowing direct access to data at the ports.
- ----------------------------------------------------------------------
- A.10) What is an MVE ?
-
- A Modular Visualisation Environment (MVE) is a package for data
- visualisation consisting of a user interface allowing linking of
- modules in a pipeline. Explorer is an example of an MVE.
-
- [ Chris Thornborrow, EPCC ]
- ----------------------------------------------------------------------
- A.11) What other MVEs are there ?
-
- Other MVEs include :
- AVS - now marketed by AVS (see comp.graphics.avs)
- apE - originally developed by Ohio Supercomputer Centre
- Khoros - developed by University of New Mexico
- (see comp.soft-sys.khoros)
-
- It would probably be more correct to define Khoros as a MAB (Module
- Application Builder) , as it is not aimed solely at visualisation.
- ----------------------------------------------------------------------
- A.12) Is there any overlap between ImageVision and Explorer
-
- ImageVision is an object oriented image processing library that
- currently has about 70 image processing functions. The architecture of
- ImageVision is designed to handle virtually any size and data typed
- image. The ImageVision library runs on all SGI machines and on a Cray.
-
- The image processing modules of Explorer were developed using ImageVision,
- and these modules in Explorer map directly to single ImageVision objects.
-
- [Nancy Cam - SGI]
- ======================================================================
- B) TOPIC: RUNNING EXPLORER
- ======================================================================
- B.1) Why does Explorer crash immediately ?
-
- The main reasons that Explorer will crash on startup (on an SGI machine)
- are :
- a) Wrong OS
- b) Incorrect installation
-
- a) Explorer on an SGI requires IRIX v4.0.1 or later.
-
- b)
-
- If you use the "-r" option on "inst" when installing Explorer,
- the X11 resource default files do not get installed correctly.
-
- Similarly, if you NFS mount /usr/explorer from a file server,
- these default resource files are not installed on your
- machine. If you must install Explorer somewhere other than
- /usr/explorer, first create /usr/explorer as a symbolic link to
- a directory somewhere else, then install Explorer. If you have
- installed Explorer with "inst -r" or if you NFS mount it from
- another machine, you can set up the necessary symbolic links
- for the X11 app-default files and the shared libraries by using
- the command (as root):
- inst -f /usr/explorer/lib/inst/explorer
-
- This will establish symbolic links in /usr/lib for those files
- that must be present on every machine that runs Explorer. This
- is explained in section 2.3.1 of the Release Notes. (from SGI)
-
- [SGI]
- ----------------------------------------------------------------------
- B.2) Can I run Explorer on one machine and display on another ?
-
- Explorer itself can run on one machine and display on ANY other machine
- running an X server. However, the modules Render and DisplayImg will
- only display/function on machines with GL hardware.
-
- The Module Builder and Datascribe can run and display on any X terminal.
-
- Since Explorer/Module Builder/DataScribe are X Motif applications, to
- get these to run externally and display on your local workstation
- running an X server, set your display variable on the external machine
- before executing the program in the usual fashion. e.g.
- a) On Local Machine :
- xhost +<remote_machine_name>
-
- b) On Remote Machine :
- setenv DISPLAY <local_machine_name>:0.0
- explorer
- ----------------------------------------------------------------------
- B.2) Can I run modules on different machines ?
-
- Modules within an Explorer map can execute on different machines,
- provided that those machines have the execution environment of Explorer
- ported to them. For example, in a network of 5 SGI w/stations, each of
- the 5 modules of an Explorer map can be running on a different
- workstation. This is achieved by pulling up a librarian for each of
- the machines on which you wish to execute modules. The librarian for
- these machines will show which modules are available, and these can be
- placed in a map in the same manner in which local modules are placed.
- Everything will `look' the same, except that the remote modules will
- fire and execute on the remote machines - this could be referred to as
- a form of coarse grain parallelism.
-
- At present, the execution environment is ported to SGI and Cray platforms,
- so modules can only execute on these machine types.
- ----------------------------------------------------------------------
- B.3) How can I start Explorer with a prefined map ?
-
- To run explorer with a predefined map, type :
- explorer -map <mapname>
-
- ,and the map will appear in the Map Editor when it starts up.
- ----------------------------------------------------------------------
- B.4) Can I run Explorer in batch mode (i.e. without the GUI) ?
-
- Version 1.0 does not have a non-GUI capability. There are
- designs being kicked around, but we believe that a totally
- non-GUI solution is not the full answer, since the "answer"
- produced by an Explorer map may in fact be an image that you
- want to view. On the other hand, some Explorer maps may only
- filter data, produce geometry into a file and not incorporate
- viewing at all. This "batch mode" would be useful for very
- long animation runs, for example.
-
- Khoros also lets single modules to run "standalone". We don't
- see this as a requirement for Explorer, except that it could
- make module debugging simpler -- one of our short-term goals.
- Being able to debug a module without all of Explorer hanging
- around would be really nice, especially as debugging tools take
- more and more resources from the machine.
-
- [ Bob Brown - SGI ]
- ----------------------------------------------------------------------
- B.5) Will Explorer work with very large data sets ?
-
- The easiest option if you have very large modules is to purchase more
- memory, but this only extends so far.
-
- Large data sets:
- This is a general weakness of data flow systems. We have a few
- ideas for helping out, but it becomes very complicated when you
- want to preserve a conceptually simple programming model. Can
- we offer an alternative execution model (that is, how things
- really compute and share data) yet maintain a simple
- programming model (that is, how the user states what is
- wanted).
-
- [ Bob Brown - SGI ]
- ----------------------------------------------------------------------
- B.6) When does a module fire ?
-
- Module inputs can be optional or required, and if the former then the module
- can happily fire without any input on that port. If the port is required,
- then a module won't fire until it has data on that port.
-
- When new data arrives at a required port, then the module fires.
-
- Question:
- We reckon that it would be `nice to have' a template matching
- type operation at the input of each module, so that intelligent
- decisions can be made as to WHEN to fire a module. e.g. don't
- fire a module when ANY of its inputs change, but be able to
- choose how a module will fire and how many of its inputs are
- REQUIRED before a successful fire - this sort of thing would be
- useful in animations involving multiple file reads.
- [ Gordon Cameron - EPCC ]
-
- The reply :
- We spent a lot of effort on this in the design phases, and came
- up with an overly powerful scheme that would be practically
- unusable, so it did not appear in V1.0. The degree of
- flexibility that can be offered seems too great, particularly
- when youconsider the possibility of being able to
- programmatically add and delete ports.
-
- Of course, using cxInputDataChanged judiciously will let you
- essentially write your own inner firing rules. However, this
- may break future versions of the firing algorithm. Also, if
- you have a non-MDW module and never issue a cxInputDataGet call
- on a port with new data, cxInputDataChanged will always report
- that there is new data on the port. You must use
- cxInputDataGet to change the port data state from "new" to
- "old".
- [ Bob Brown - SGI ]
- ----------------------------------------------------------------------
- B.7) Why does Explorer run slowly on my system ?
- [ Jack Gallant - Caltech ]
-
- The overhead of X windows and Motif is not insignificant. Two
- factors can really slow down Explorer: insufficient memory and
- NFS mounting /usr/explorer. The first one we can help out
- with, but the second one is out of our hands for the most part
- (having local copies of the shared libraries can help,
- though).
- [ Bob Brown - SGI ]
- ----------------------------------------------------------------------
- B.8) How can I customize the look of Explorer ?
-
- Explorer, and the Data Scribe and Module Builder are all X/Motif
- applications, and have several resources which can be altered so that the
- tools' appearance can be customised. Look at the explorer directory
- [/usr/explorer]/lib/X11/app-defaults to see what's what. (The directory
- enclosed in square brackets is the home of Explorer on your system).
- ======================================================================
- C) TOPIC: USING EXPLORER with the MAP EDITOR
- ======================================================================
- C.1) Why does Explorer ignore all my input ?
-
- A possibility is that you have closed the main Explorer window, and an
- error has been generated - if you have closed the small gui window,
- then the error diagnostic will not appear on the screen, and the entire
- interface will appear to hang. However, opening the gui window again
- will rectify matters.
-
- [ Leo Blume - SGI ]
- ----------------------------------------------------------------------
- C.2) Why can't I start a GenerateColormap module ?
-
- If you have applications running that have allocated colormap cells, then
- the number of cells available to GenerateColormap is reduced, so that only
- one (or perhaps no) GenerateColormap will be able to execute.
-
- One way round this is to reconfigure the X server, and this is
- described in Appendix B of the User Guide (also supplied electronically
- with the release) - what you end up doing is in effect choosing a
- different visual.
- ----------------------------------------------------------------------
- C.3) How can I stretch the librarian scrolling list ?
-
- You can't #:-} , at least not in Explorer 1.0
- [ Roy Hashimoto - SGI ]
- ----------------------------------------------------------------------
- C.4) How can I slice into an iso-surface ?
-
- Full Question :
- I've tried orthoslice, it will move the slice plane into the
- data but the full iso-surface is still there, the outside is
- not cut away.
- [ Gus Williams ]
-
- Answers:
- The slices generated by Orthoslice won't cut away the
- isosurface. Orthoslice and IsosurfaceLat generate completely
- independent geometry that is composited in the renderer. It
- might be nice, though, to have this capability in the future.
-
- For the present, you can use SampleCrop to do that or just
- adjust the transparency on the isosurface so that you can see
- through it to the cutting plane.
- [ Leo Blume - SGI ]
-
- ...you can use CropLattice to crop the
- lattice before taking the isosurfaces. I'm not sure how it
- could be done any other way with the standard module set.
- [ Robert Skinner - SGI ]
- ----------------------------------------------------------------------
- C.5) How can I render translucent solids ?
-
- You can pass your data through the module VolumetoGeom and then on to
- the Render module. VolumetoGeom makes use of a technique known as
- "splatting" to visualise volumes like this - a good reference is :
-
- Hierarchical Splatting: A Progressive Refinement Algorithm for
- Volume Rendering by David Laur and Pat Hanrahan.
-
- ..and this paper appeared at SIGGRAPH '91.
- ----------------------------------------------------------------------
- C.6) Why can I not get LatFunction to work ?
-
- Explorer has a known bug in LatFunction...The following is a long
- answer, and will be condensed in time.
-
-
- Problem a) - Why can I never get LatFunction to work?
-
- The problem is that if LatFunction's "Program File" typein does
- not refer to an existing file, then the module's interpreter
- gets confused and will never work correctly on any program file
- thereafter. Unfortunately, the empty string (the default when
- LatFunction is brought up from the librarian) is such an
- invalid name and will confuse the module.
-
- Thus, the symptom you will see is that the user instantiates a
- LatFunction module, types in a file name, and gets errors. e.g.
-
- float f[2,3,4];
- Second_Out := First_In;
-
- yields the error message :
- [Unbound symbol: First_In]
-
- This identifies problem a) - when you instantiate LatFunction,
- it tries to read file "" and fails.
-
- Solution a)
-
- All you have to do is instantiate a LatFunction module
- with the Program File name in place. You can do this by
- duplicating the brain-dead LatFunction -- the new
- LatFunction<2> will work as expected (delete the old module
- after duplicating a new one). You can also save the
- LatFunction module with typed-in name in a map and load that
- map.
-
- Also, LatFunction-based modules (see the MWG, chapter 4) are
- less prone to this problem for two reasons. This makes them
- easier to work with than plain LatFunction. The first reason is
- that LatFunction-based modules typically have a filename
- specified, so these will work even when dragged from the
- librarian. The second :reason is that they typically have
- required port data, so they will not fire when instantiated,
- thus giving you time to type the right filename.
-
- ==========================================================
-
- Problem b) - Why does LatFunction give me the "[Unbound
- symbol:...]" error message and refuse to work ?
-
- This is the same as problem a). The "[Unbound symbol: ...]"
- message is LatFunction's way of saying that it is confused.
-
- Solution b)
-
- As solution for Problem a).
-
- ==========================================================
-
- Problem c) - Why does LatFunction sometimes give an error
- "[Unbound symbol:...]" on some line after I edit my
- file, but then not give the error the next time I read
- in the file?
-
- This is related to problems 1 and 2. In this case the parsed program
- is referenced incorrectly and the interpreter exhibits the same type
- of confusion as before. However, this error is recoverable by
- reparsing the Shape program file (type <CR> in the "Program File"
- typein).
-
- Solution c)
- Reparse the Shape program file (type <CR> in the "Program File"
- typein).
- [SGI]
-
- ======================================================================
- D) TOPIC: USING THE DATASCRIBE
- ======================================================================
- D.1) Why does the help file not reflect the actual widget ?
-
- In some cases, the DataScribe can get confused with consistency between
- .doc and .help files, but there is a workaround. The following Q&A from
- the list illustrates a specific example.
-
- Original Question :
- I created a module using the data scribe which had a file
- browser widget. When I edited the .help file produced the
- following lines were present ..
-
- pbmascii -- Text
- <Describe the purpose of the widget here>
-
- Note that the widget is described as text, not file browser. Is
- this deliberate - I can see how it would be as the file browser
- widget is really an elaborate text widget ?
- [ Chris Thornborrow - EPCC ]
-
- Solution :
- This looks like a bug. dot-help files are derived from dot-doc
- files. When you do a "Save" from the datascribe, it appears to
- not rewrite the doc file (even if you changed a widget type,
- say, from Text to File Browser) but it does regenerate the help
- file from the doc file.
-
- I tried your example and that is what happened. My guess is
- that you had previously saved when "pbmascii" was really a Text
- widget, then you changed it to a browser and saved again.
-
- Remove your dot-doc file and do a Save again from datascribe.
- That should fix things up. Or, if you've already edited the
- doc file, bring up the module builder on your module and select
- "Update Document" under the "Build" menu.
- [ Bob Brown - SGI ]
- ======================================================================
- E) TOPIC: USING THE MODULE BUILDER
- ======================================================================
- ======================================================================
- F) TOPIC: PROGRAMMING MODULES
- ======================================================================
- E.1) How can I wake Explorer on events ?
-
- I would like wake-up Explorer on the following event:
- one descriptor is ready for reading/writing
- [ F. Lapique ]
-
- This has to be done using X directly. The following details how :
-
- In Version 1.0 Explorer the only way to do this is through X
- windows. Make your module an X module (in the Build
- Options... window in the module builder) and then you can use
- the XtAddInput mechanism to register a callback procedure with
- the scheduler. The Xt manual describes how to use XtAddInput;
- it is relatively simple and straightforward. We don't have
- code examples, but if you have trouble, let me know and I'll
- write one up. Another user has reported success at doing
- this.
-
- Be aware that execution highlighting will not occur when your
- callback is called. This is because the module isn't "really"
- firing. In fact, you should not call cxOutputDataSet() or
- cxOutputDataFlush() from the callback. Instead, if you want to
- send data downstream, use cxFireASAP() from the XtAddInput()
- callback to schedule the firing of your computation routine,
- and maintain some state that lets that routine know what's
- what.
-
- The next version generalizes this mechanism by adding a
- cxAddInput routine that works the same way, but doesn't
- (necessarily) use X windows. (We haven't announced a release
- schedule for the next version).
-
- [ Bob Brown - SGI ]
- ----------------------------------------------------------------------
- E.2) What has happened to the routine cxInputPortStateGet ?
-
- There is no such routine, and it shouldn't appear in the documentation.
- To emulate the stated effect, do :
-
- cxInputConnectsGet() // To tell if port is connected
- cxInputDataGet() // returns 0 for no data
- cxInputDataChanged() // to find if data there is new or old
-
- [ Dave Foulser - SGI ]
- ======================================================================
- G) TOPIC: MODULES AVAILABLE/WANTED
- ======================================================================
- G.1) Where can I get PD modules ?
-
- There are a few modules available by anon. FTP, including one
- to enable/disable geometry information. Many more modules should
- appear very soon.
-
- See the FAQ header for FTP addresses etc...
- ======================================================================
- H) TOPIC: FURTHER INFORMATION
- ======================================================================
- H.1) Where can I obtain documentation ?
-
- Compressed electronic copies of Postscript documents are supplied with
- the release of Explorer. Only certain chapters and an Appendix appear
- in the directory [/usr/explorer]/doc/userguide, though. You can obtain
- the complete User Guide, Module Writer's Guide and Module Definitions
- guide by getting in touch with SGI, who can supply bound copies.
-
- The electronic source for the Module Writer's guide is now
- available by anon. FTP !! (see header for addresses)
-
- The contact number I have for info on SGI is (415) 960-1980.
- ----------------------------------------------------------------------
- H.2) Is there a mailing list/FTP site ?
-
- At present there is an Explorer mailing list for discussion on all aspects
- of the package. The list was started in March of '92, and has around 250
- subscribers (not including feeds) - several of the developers of Explorer
- are subscribed, so the list provides a good forum for discussion which may
- change the shape of future versions.
-
- To join the list, or to get further details, send some mail to :
- explorer-request@castle.ed.ac.uk
-
- There is also an FTP site which contains archives of postings to the
- explorer mailing list, as well as many other things including a User
- List and an up to date FAQ(this!), and it is hoped that this site will
- develop into a store for PD modules in time. There are a few modules
- here just now, but many more are expected soon.
-
- The site can be contacted as :
- ftp.epcc.ed.ac.uk (129.215.56.29)
- , and supports anonymous FTP. The explorer directory is /pub/explorer.
-
- In addition, Jeff Hanson has kindly mirrored this site in the US as :
- swedishchef.lerc.nasa.gov (139.88.54.33))
- ----------------------------------------------------------------------
- H.3) Is there a relevant newsgroup ?
-
- At present (31st March 1992) there is no newsgroup specifically for
- the discussion of Explorer-related issues, although this may well
- change in the near future.
-
- However, the groups comp.sys.sgi and comp.graphics.visualization are
- certainly useful, and often relevant #:-}
- ----------------------------------------------------------------------
- H.4) Why are the electronic PostScript files incomplete ?
- The SGI Explorer is supplied with a directory /doc, which contains
- the userguide in PostScript form. This is missing Chapter 1 and the
- first Appendix. The explanation SGI give is as follows :
-
- Chapter 1 is the "Getting Started" guide that comes with the
- Explorer CD or tape. The missing appendix contains the module
- manual pages, which are accessible via the Unix "man" command.
-
- The release notes are on-line and can be viewed by using the
- "grelnotes" command.
-
- The Module Writer's Guide is not in the software distribution
- in this release because of differing production schedules for
- the software and documentation. It may be included in future
- releases. (from SGI)
-
- The Module Writers' Guide is now available by FTP in electronic
- version.
- ======================================================================
- I) TOPIC: MISCELLANEOUS
- ======================================================================
- I.1) How can I add/correct or comment on Q&As on the FAQ ?
-
- Mail explorer-request@castle.ed.ac.uk . Simple !
-
- I.2) Where can I find a list of bugs ?
-
- A few bugs are listed in this FAQ. Others can be found by looking
- at the file in the /pub/explorer/bugs directory at the FTP site.
-
-
-
-
-
- Article 1990 of comp.graphics.visualization:
- From: software@riemann.geom.umn.edu (Geometry Center Software Development Group)
- Subject: Geomview is available --- 3D object viewer
-
- The Geometry Center announces release 1.1 of geomview, a program for
- looking at and interactively manipulating 3D objects. The current
- version runs on Silicon Graphics IRIS workstations. It is available
- via anonymous ftp at geom.umn.edu (128.101.25.31) in the "pub/geomview"
- subdirectory. "geomview-bin.tar.Z" contains pre-compiled binaries,
- documentation, and data and takes up 3 MB of disk space. The source
- distribution is "geomview.tar.Z" and takes up 21 MB of disk space. To
- unpack, type "uncompress < [geomview|geomview-bin].tar.Z | tar xvopf -".
-
- Please send all correspondence regarding this software via email to
- "software@geom.umn.edu".
-
- Geomview represents the current state of an ongoing effort at the
- Geometry Center to provide interactive 3D graphics software which is
- particularly appropriate for displaying the kinds of objects and doing
- the kinds of operations of interest in mathematics research and
- education. While geomview was developed as a tool for research
- mathematicians, it is a general-purpose graphics system which could be
- useful in many domains. It can be used to examine a static object or
- as a dynamic display for a running program. An extensive command
- language allows programmers to easily extend the functionality of the
- basic viewer by writing external modules. Currently hyperbolic
- visualization capabilities are built-in, while four-dimensional
- visualization is handled through external modules.
-
- Geomview allows multiple independently controllable objects and
- cameras. Interactive control for motion, appearances (including
- lighting, shading, and materials), picking on an object, edge or
- vertex level, and adding or deleting objects is provided through
- direct mouse manipulation, control panels, and keyboard shortcuts.
- External programs can drive desired aspects of the viewer (such as
- continually loading changing geometry or controlling the motion of
- certain objects) while allowing interactive control of everything
- else.
-
- Geomview supports the following simple data types: polyhedra with
- shared vertices (.off), quadrilaterals, rectangular meshes, vectors,
- and Bezier surface patches of arbitrary degree including rational
- patches. Object hierarchies can be constructed with lists of objects
- and instances of object(s) transformed by one or many 4x4 matrices.
- Arbitrary portions of changing hierarchies may be transmitted by
- creating named references.
-
- The Geometry Center is an NSF-funded independent research group based
- at the University of Minnesota. The three-fold mission of the Center
- is to support and promote mathematics and computer science research;
- software, animation, and tool dvelopment and production; education and
- communication of mathematics at all levels. The Geometry Center's
- offical name is the "National Science and Technology Research Center
- for Computation and Visualization of Geometry Structures".
-
- The Geometry Center
- University of Minnesota
- 1300 S. 2nd St.
- Minneapolis, MN 55454 USA
-
-
- Article 1995 of comp.graphics.visualization:
- From: vachha@cisa.cis.uab.edu (Rustom (Yuppy) Vachha)
- Newsgroups: comp.graphics.visualization
- Subject: References on representing N Dim data
-
- References in represnting N-dimensional data in 2 or 3 D.
-
- Chambers, J. M., Cleveland, W. S., Kleiner, B., and Tukey, P. A. (1983).
- Graphical Methods for Data Analysis. Belmont, CA: Wadsworth Press.
-
- Wang, P. (1978). Symposium on Graphical Representation of Multivariate
- Data. New York: Academic Press.
-
- While these references are very old, they will provide you with a nice
- introduction to static multivariate graphics. If you are interested in
- dynamic multivariate graphics, I would look at:
-
- Cleveland, W. S., and McGill, M. E. (1988). Dynamic Graphics for Statistics.
- Belmont, CA: Wadsworth Press.
-
- Edwin A. Abbott, "Flatland. A Romance of Many Dimensions", Signet, New York,
- 1884 (reprint). Also from Dover Books.
-
- H.F. Baker, "Higher Geometry; being Illustrations of the Utility of the
- Consideration of Higher Space, especially of 4 and 5 Dimensions" (Principles
- of Geometry; Vol.4), Ungar, 1963.
-
- Dionijs Burger, "Bolland", Veen, Utrecht, 1983. In Dutch, but there are
- English translations as well, probably titled "Sphereland". I don't know who
- published these.
-
- Thomas F. Banchoff, "Beyond the Third Dimension, Geometry, Computer Graphic
- and Higher Dimensions", Sci Amer. Library, 1990.
-
- A.K. Dewdney, "Hypercubes", Scientific American, Vol. 254, Nr. 4 (april 1986),
- pp. 8 - 13.
-
- Steve Hollasch, "Four-Space Visualisation of 4D Objects", M. Sc. Thesis,
- Arizona State Univ., 1991.
-
- Rudy Rucker, "Geometry, Relativity and the Fourth Dimension", Dover Books,
- 1977.
-
- Rudy Rucker, "The Fourth Dimension, and How to Get There", Penguin, UK,
- 1986. I don't know the American publisher.
-
- Jeffrey R. Weeks, "The Shape of Space, How to Visualize Surfaces and
- Three-Dimensional Manifolds", Marcel Dekker, Inc., New York, 1985.
-
-
- Pielou, E.C.
- The interpretation of ecological data: a primer on classification
- and ordination
- (Wiley,1984)
-
-
- D. Asimov, ``The grand tour: a tool for viewing multidimensional data'',
- SIAM Journal on Scientific and Statistical Computing, 6 (1985) 128-143.
-
- C. Hurley and A. Buja, ``Analyzing high-dimensional data with motion
- graphics'', SIAM J. Sci. Stat. Comp., 11 (1990) 1193-1211.
-
- See the 2-volume set Multidimensional Scaling by the authors
- (I think) Shepard, Kruskal, and Nerlove.
-
-
- Films:
-
- "The Hypercube: Projections and Slicing", prod. Thomas F. Banchoff & Charles
- Strauss, 1978.
-
- "The Hypersphere: Foliation and Projections", prod. Thomas F. Banchoff,
- Huseyin Kocak, David Laidlaw & David Margolis, 1986.
-
-
- Computer programs:
-
- Steve Hollasch, "ray4-1.00" & "wire4-1.00", ftp swedishchef.lerc.nasa.gov,
- directory programs/hollasch-4d
-
- ftp site: search archie for something called xgobi (probably at Purdue)
-
-
- Also:
-
- A Topological Picturebook by George K. Francis, published by Springer Verlag.
-
-
-
-
- Article 2002 of comp.graphics.visualization:
- Newsgroups: comp.graphics.visualization
- From: johne@iti.gov.sg (Dr. John S. Eickemeyer)
- Subject: Re: References on representing N Dim data
-
- And of course, no reference list about representing multidimensional data
- would be complete without Parallel Coordinates... :) If you need a general
- method that can represent multivariate relationships in N dimensions, I
- would recommend taking a good look at Parallel Coordinates. The papers by
- Inselberg are the best place to start...
-
- \bibitem[Cho87]{Cho87} T. Chomut (1987), {\bf Exploratory Data
- Analysis Using Parallel Coordinates}, M. Sc. Thesis, UCLA Computer
- Science Dept., IBM LA Sc. Cen. Rep. 1987-2811.
-
- \bibitem[DW91]{DW91} A. Desai, L. C. Walters (1991), {\it Graphical
- Presentations of Data Envelopment Analyses: Management Implications from
- Parallel Axes Representations\/}, Decision Sciences Journal,
- {\bf 22-2:} 335-353.
-
- \bibitem[Eic91]{Eic91} J. S. Eickemeyer (1991), {\bf Visualizing \(p\)-Flats
- in \(N\)-Space Using Parallel Coordinates}, PhD. Thesis, UCLA Computer
- Science Dept.
-
- \bibitem[GDCM90]{GDCM90} C. Gennings, K. S. Dawson, W. H. Carter, R. H.
- Myers (1990), {\it Interpreting Plots of a Multidimensional Dose-Response
- Surface in a Parallel Coordinate System\/}, Biometrics
- {\bf 46:} 719-735.
-
- \bibitem[ID87]{ID87} A. Inselberg, B. Dimsdale (1987), {\it
- Parallel Coordinates For Visualizing Multi-Dimensional
- Geometry\/}, in {\bf Proceedings of Computer Graphics International
- '87} (T. L. Kunii, ed.), Springer-Verlag, Toyko.
-
- \bibitem[ID90]{ID90} A. Inselberg, B. Dimsdale (1990), {\it
- Parallel Coordinates: A Tool For Visualizing Multi-Dimensional
- Geometry\/}, Proc. IEEE Conf. Visualization '90, 361-378.
-
- \bibitem[IRC87]{IRC87} A. Inselberg, M. Reif \& T. Chomut (1987), {\it
- Convexity Algorithms in Parallel Coordinates\/}, Journal of the ACM {\bf
- 34:} 765-801.
-
- \bibitem[Ins85]{Ins85} A. Inselberg (1985), {\it The Plane with
- Parallel Coordinates\/}, Special Issue on {\it Computational
- Geometry\/}, The Visual Computer {\bf 1:} 69-91.
-
- \bibitem[Weg90]{Weg90} E. Wegman (1990), {\bf Hyperdimensional Data
- Analysis Using Parallel Coordinates}, J. Amer. Stat. Assoc. {\bf 85:}
- 664-675.
-
-
- From: ilana@niwot.scd.ucar.EDU (Ilana Stern)
-
- The best thing would be if you could just ask people to ftp it from the
- pit-manager.mit.edu site, because I would rather not be bothered by
- people who want it. The document at csn.org is also a good resource.
-
- Newsgroups: sci.geo.meteorology,news.answers
- Subject: Sources of Meteorological Data FAQ
- Followup-To: sci.geo.meteorology
- Reply-To: ilana@ncar.ucar.edu
- Approved: news-answers-request@MIT.Edu
- Summary: Weather and research data available via Internet, CD-ROM, and tape.
- Supersedes: <1992Sep21.155426.25740@ncar.ucar.edu>
- Expires: Tue, 20 Oct 1992 07:00:00 GMT
-
- Archive-name: weather-data
- Last-modified: 24 September 1992
-
- Recent changes:
- Addition of liasun3.epfl.ch ftp site
- Addition of IP number to cumulus.met.ed.ac.uk site
- --
- **COMPLETELY NEW FORMAT**
- Addition of Digital Chart of the World CD-ROM
- New information on marlin.jcu.edu.au ftp site
- Addition of delocn.udel.edu ftp site
- New format information for DMSP SSM/I Ice Concentration Grids CD-ROM
- Addition of WX-TALK to mailing list section
- Cleanup of cdiac.esd.ornl.gov ftp site listing
-
- This is a guide to various sources of meteorological, oceanographic,
- and geophysical data. Some of these data types are intended for enjoyment
- or hobbyist use; other data are more research-oriented. Much of the
- research data is not free.
-
- More information on geological/geographical data can be found in the
- FAQ for sci.geo.geology, or see the file available via FTP from csn.org.
-
- This guide is posted every two weeks; a copy can be obtained by
- anonymous FTP to pit-manager.mit.edu, from the file weather-data in
- the directory /pub/usenet/news.answers. A copy is also maintained in
- vmd.cso.uiuc.edu in the file SOURCES.DOC.
-
- Corrections, additions, and comments should be sent to Ilana Stern at
- ilana@ncar.ucar.edu. **If you plan to redistribute this file to a mailing
- list, in another newsgroup, or in a newsletter, PLEASE CONTACT ME FIRST!**
-
- ########################################################################
-
- C O N T E N T S
-
- I. Data available over the Internet
- II. CD-ROM source list
- III. Research data on tape and other media
- IV. Weather-related mailing lists
-
- ########################################################################
-
- Subject: Data available over the Internet
-
- C O N T E N T S
-
- 1. How to use anonymous FTP
- 2. How to use telnet
- 3. Index of FTP and Telnet sites by topic
- A. Current weather images via FTP
- B. Current weather data via telnet
- C. Meteorological, oceanographic, and geophysical research data
- D. Other satellite images
- E. Map data
- F. Other stuff
- 4. Alphabetical list of FTP and Telnet sites, with information
-
- 1. How to use anonymous FTP
-
- FTP (File Transfer Protocol) allows transfer of files between two computers
- which are on the Internet. To access the FTP areas listed here, at your
- system prompt type "ftp" followed by the name or IP number (the number
- in brackets next to the system name in the listing below) of the desired
- system. For example, to access vmd.cso.uiuc.edu you'd type
-
- ftp vmd.cso.uiuc.edu
- or
- ftp 128.174.5.98
-
- Use "anonymous" as your login and your email address as the password (if
- requested).
-
- [Note: quotes ("like this") are used to set off names of directories and
- files, or commands you'd type, and are not part of these names.]
-
- Not all FTP systems accept the same commands, but here's a list of the
- most useful:
-
- ls list files in the current directory.
- cd change directory, e.g. "cd wx" changes to the wx directory.
- binary sets binary mode; USE THIS FOR RETRIEVING IMAGES!
- ascii sets ascii mode (the default). Use for retrieving text.
- get retrieves a file, e.g. "get readme" gets a file called readme.
- bye exits FTP.
-
-
- 2. How to use telnet
-
- Type "telnet" followed by the name or IP number (the number in brackets next
- to the system name in the listing below) of the desired system. These
- publicly accessible systems generally allow you to log in but put you in
- a restricted shell, from which only a certain menu of commands is available.
-
-
- 3. Index of FTP and Telnet sites by topic
-
- This index lists the names of FTP and Telnet sites of interest, with only
- a brief blurb as to their contents. Section 4 gives more information about
- each of these sites. Some sites appear more than once under different
- subject headings.
-
- A. Current weather images
-
- ats.orst.edu GOES vis/IR images of North, Central America
- aurelie.soest.hawaii.edu SST data from AVHRR on NOAA-11, NOAA-12
- cumulus.met.ed.ac.uk Meteosat vis/IR images of Europe
- liasun3.epfl.ch Meteosat vis/IR images of Europe
- marlin.jcu.edu.au GMS-4 images of Australia, TOGA/COARE area
- unidata.ucar.edu Surface maps (US, Europe, China), soundings
- uriacc.uri.edu NOAA-11 images of the northeast US
- vmd.cso.uiuc.edu GOES-7 vis/IR images, surface analyses over US
-
- B. Current weather data
-
- ats.orst.edu Some US city and Oregon weather forecasts
- hermes.merit.edu US weather forecasts, global reports
- madlab.sprl.umich.edu 3000 US weather forecasts, global reports
- ncardata.ucar.edu Colorado weather forecasts
-
- C. Meteorological, oceanographic, and geophysical research data
-
- cdiac.esd.ornl.gov Info on climate change topics
- ncardata.ucar.edu Info on datasets available from NCAR
- nssdca.gsfc.nasa.gov Info on datasets available from NSSDC
- storm.mmm.ucar.edu STORM-FEST data
- pioneer.unm.edu Data and software from various CD-ROMs
-
- D. Other satellite images
-
- ames.arc.nasa.gov Various earth-from-space images
- pioneer.unm.edu Various images taken from CD-ROMs
- sanddunes.scd.ucar.edu AVHRR images of USA via telnet
- snow.nohrsc.nws.gov Snow cover maps of US from GOES
- sseop.jsc.nasa.gov Pictures taken from the space shuttle
-
- E. Map data
-
- csn.org Mapping software and datasets
- hanauma.stanford.edu CIA World Bank database, 0.5 deg elev dataset
- ncardata.ucar.edu Elevation data
- pioneer.unm.edu World atlas, census data, others
- spectrum.xerox.com Various USGS data
-
- F. Other stuff
-
- csn.org Information on other Internet resources
- delocn.udel.edu Software for oceanographic computations
- ncardata.ucar.edu Script to retrieve vmd.cso.uiuc.edu GIFs
- pioneer.unm.edu Image display software
- vmd.cso.uiuc.edu Documents on weather-related topics
-
-
- 4. Alphabetical list of FTP and Telnet sites, with information
-
- This section provides expanded listings of the sites in the previous
- section. Remember to set the transfer type to "binary" when retrieving
- images!
-
- ames.arc.nasa.gov (FTP)
- Change directory to "SPACE/CDROM". Images from Magellan and Viking
- missions, other stuff.
-
- ats.orst.edu [128.193.120.19] (FTP)
- GOES IR and VIS images over North and Central America, plus a "floater"
- image which "could be anything." Also Oregon and US city forecasts.
-
- aurelie.soest.hawaii.edu [128.171.151.121] (FTP)
- Sea-Surface-Temperature data (near-real-time) in the directory
- "pub/avhrr/images". AVHRR images within the radius of reception of the
- university's HRPT station, approximately 5 S to 45 N and 125 W to 165 E.
- The processed images are available usually within 30 min. of NOAA-11 and
- NOAA-12 passages. Data are compressed binary in netCDF format (get
- documentation from unidata.ucar.edu FTP site) labelled by satellite name
- (n11/n12) and time. More info available from hrpt@hokulea.soest.hawaii.edu.
-
- cdiac.esd.ornl.gov [128.219.24.36] (FTP)
- Contains data and information on general and technical aspects of
- carbon dioxide, methane, and other trace gas emissions; the carbon cycle;
- and other climate-change topics from CDIAC (the Carbon Dioxide Information
- Analysis Center, address in section 3). The data for CDIAC's "Trends 91:
- A Compendium of Data on Global Change" is also available here. (Contact
- CDIAC at cdp@stc10.ctd.ornl.gov to obtain a copy of the book.)
-
- csn.org [128.138.213.21] (FTP)
- Change directory to "COGS". A large, frequently updated file containing
- detailed information on FTP sites, Bitnet and Usenet discussion groups,
- and data sources is located in the file "internet.resources.earth.sci".
- This file contains more information on mapping, GIS, remote sensing, and
- geology, subjects which are mostly outside the scope of this meteorology-
- oriented FAQ. Mapping software and datasets are also available in this
- directory. Contact bthoen@csn.org (Bill Thoen) for more information.
-
- cumulus.met.ed.ac.uk [129.215.168.19] (FTP)
- Change directory to "images". IR and visible images of Europe from
- Meteosat, twice daily, in 1152 x 900 GIF format (size of Sun root window).
- The subdirectory "gifs" has smaller 3x daily images of the Nordic areas,
- the UK, and Europe.
-
- delocn.udel.edu (FTP)
- Change directory to "FORTRAN". Programs to do various oceanographic
- computations. Inquiries and calls for help can be addressed to
- walt@delocn.udel.edu.
-
- hanauma.stanford.edu [36.51.0.16] (FTP)
- The CIA World Bank database contains coastlines, rivers and political
- boundaries. An 0.5 degree elevation dataset is also there. A program for
- decoding the CIA data can be found as "mfil" on pi1.arc.umn.edu
- [137.66.130.11] (Info from ken@msc.edu)
-
- hermes.merit.edu [35.1.48.150] (Telnet)
- Type um-weather at the "Which Host?" prompt and use menus.
- (Connects to madlab.sprl.umich.edu)
-
- liasun3.epfl.ch (FTP)
- Change directory to "pub/weather". IR and visible images of Europe
- from Meteosat, in GIF format. It appears that this site contains
- the same images as cumulus.met.ed.ac.uk.
-
- madlab.sprl.umich.edu 3000 [141.212.196.79] (Telnet)
- Include the "3000" when connecting to the machine. This is a menu driven
- system which has a large variety of information, including US and Canadian
- weather forecasts, ski conditions, earthquake reports, severe weather
- reports, and current weather conditions for some international cities.
-
- marlin.jcu.edu.au [137.219.16.14] (FTP)
- Change directory to "JCUMetSat". GMS-4 images updated regularly for
- various Australian states, Australia as a whole, the globe, the TOGA/COARE
- area, and events of interest such as cyclones. The images are in a format
- designed for the package JCUMetSat on Amiga computers, but can be converted
- to GIF format using the ALCHEMY software (shareware) available at this site.
- (More information on the format and images can be obtained from Professor
- C.J. Kikkert, eecjk@marlin.jcu.edu.au.)
-
- ncardata.ucar.edu [128.117.8.111] (FTP)
- Information on datasets available from NCAR (the National Center for
- Atmospheric Research), and a few small datasets. If you would like to
- order data after browsing this information, email to datahelp@ncar.ucar.edu.
- Small datasets can be provided by FTP; we also write various kinds of tapes.
- See the README file.
- A shell archive containing scripts to retrieve GIFs from vmd.cso.uiuc.edu,
- get_gifs, is located in the "weather" subdirectory. This subdirectory also
- contains Colorado weather and ski reports.
- A few special datasets are located in the FTP area, and are free. They
- are described in the file "pricing". These include a 1 deg resolution
- elevation dataset, a continental outline dataset, and a list of all WMO
- stations with latitude, longitude, and elevation.
-
- nssdca.gsfc.nasa.gov (FTP or Telnet)
- Telnet: The National Space Science Data Center (NSSDC) On-Line Data and
- Information Service (NODIS) is a menu-driven interactive system which provides
- information on services and data supported by NSSDC. Login as NSSDC. Some
- topics: Nimbus-7 GRID TOMS Data, Geophysical Models, Standards and
- Technology Information System.
- FTP: some information and actual data is also available via anonymous FTP.
-
- pioneer.unm.edu [129.24.9.217] (FTP)
- Change directory to "pub/info" and retrieve beginner-info, cd-list,
- newcd-list, and cd-schedule to get started. This machine is part of the
- Space and Planetary Image Facility (SPIF), sponsored by the Computer and
- Information Resource Technology group at UNM; it currently has 3 CD readers
- and expects to add more. You can use this machine to FTP data and software
- from a variety of CD-ROMs, including both research data and images. There
- is no charge for this service. Contact help@pioneer.unm.edu for more
- information.
-
- sanddunes.scd.ucar.edu (Telnet)
- AVHRR (Advanced Very High Resolution Radiometer) images from 1989 through
- 7 Jan 1992 cover CO, WY, KS, NE, and NM, as well as parts of AZ, UT, OK,
- and TX. Since 7 Jan 1992, coverage includes these plus CA, OR, NV, WA,
- and MT, to 1000 km off Pacific coast. Total coverage of US for 1989-present
- will be available soon. West coast data from 1980-1985 will be available
- some time this year.
- Images are 1024 lines x 1024 elements before 7 Jan 1992, 2560 lines x
- 1024 elements after. Images are 1 km resolution and 8-bit format.
- Contact Tim Kelley by email kelley@sanddunes.scd.ucar.edu or telephone
- 303/497-1221 for login, password, and manual. Service is free to Internet
- users and is funded by NASA.
-
- snow.nohrsc.nws.gov [192.46.108.1] (FTP)
- Change directory to "snow". Various snow-related images in GIF form.
- US snow cover map updated weekly. JPEG of current AVHRR images. Contact
- tim@snow.nohrsc.nws.gov (Tim Szeliga) for more info.
-
- spectrum.xerox.com [192.70.225.78] (FTP)
- Various USGS data in subdirectories under the directory "pub/map".
-
- sseop.jsc.nasa.gov [146.154.11.34] (FTP)
- Many pictures taken from the space shuttle. Files are in a 512x512
- format as red, green, and blue bitmaps. Image files are binary format,
- and have .DAT as an extension.
-
- storm.mmm.ucar.edu [128.117.88.53] (FTP)
- Hourly and 5-minute composite surface observations, and composite
- rawinsonde soundings, from STORM-FEST, in the directories "/fest/hrly_sfc",
- "fest/5min_sfc", and "/fest/sounding", respectively. There is one file per
- day. The data are in ASCII. This data is a preliminary release.
- This FTP system will eventually be replaced by a different data access
- system, although the data will still be available via the new system.
- (Info from Mark Bradford, bradfrd2@ncar.ucar.edu)
-
- unidata.ucar.edu [128.117.140.3] (FTP)
- Change directory to "images". Weather radar summary map GIFS, surface maps
- for various places, a few soundings on skew-t log-p diagrams, GOES Hugo images
- (in subdirectory "images/hugo"). Surface maps include Europe and China.
-
- uriacc.uri.edu [131.128.1.1] (FTP)
- Change directory to "davet.195". Images of the northeast US in GIF format
- from the afternoon passes of NOAA-11. (Provided by Dave Tetreault,
- DAVET@uriacc.uri.edu.)
-
- vmd.cso.uiuc.edu [128.174.5.98] (FTP)
- Change directory to "wx". GOES-7 visible and IR images over the US and
- Mexico, and surface analyses over the US, are available in GIF format. A
- script to retrieve GIFs automatically is available from the ncardata.ucar.edu
- FTP area.
- Also available in this directory are many useful documents, including
- SPOTFREQ.DOC and CHASE-TV.DOC, lists of ham radio frequencies and TV
- stations which carry useful info for storm chasers, WX-PUBS.DOC, which is
- a list of weather-related publications, WX-TALK.DOC, which gives information
- on the WX-**** mailing lists, and many others.
-
- ########################################################################
-
- Subject: CD-ROM source list
-
- C O N T E N T S
-
- 1. Basic information
- 2. List of CD-ROMs by topic, with summaries
- A. Weather data
- B. Research data
- C. Miscellaneous
-
- 1. Basic information
-
- CD-ROMs tend to be relatively expensive, but can hold as much as 600 megabytes
- of data. Prices are current as of October 1991; prices for some discs
- are not known. Some discs are provided with driving software. Most of
- the software is for IBM-PC or compatible systems, but some is available
- for the Macintosh, and, increasingly, for Unix systems.
-
- Some of these listings are not for CD-ROMs, but are for floppies or
- tapes. These are listed here, rather than in the section on data available
- on other media, because they have been prepared as a package. The
- research data available on tape is generally copied from a computer
- archive as requests come in.
-
- Commercial sources are flagged as such. Inclusion of a commercial
- source in this listing does not imply endorsement.
-
- 2. List of CD-ROMs by topic, with summaries
-
- A. Weather data
-
- Climate Change Data ($950, or 595 pounds sterling from UK source):
- Monthly 5-degree surface temperature anomaly grids 1854-1990, pressure
- grids 1873-1990. Monthly world temperature data at about 3500 stations and
- precipitation data at about 6500 stations, for period of record (long).
- Retrieval and mapping software included, available for various systems.
- Contact: Dr. Phil Jones, Climatic Research Unit, University of East
- Anglia, Norwich NR4 7TJ United Kingdom. Distributed in North America by
- Chadwyck-Healey Inc.,1101 King St, Alexandria, VA 22314. 800/752-0515.
-
- World Weather Disc ($295):
- Monthly temp, precip, pressure, sunshine data for about 2000 world stations
- for period of record. Daily weather data at hundreds of US stations. Data
- for some stations on temp, precip, freeze, drought, soil moisture, wind,
- storms. Frequency and movement of tropical cyclones.
- Contact: Cliff Mass, Dept. of Atmos. Sci. (AK40), University of Washington,
- Seattle, WA 98195. 206/685-0910.
-
- National Climate Info System ($50):
- Monthly temperature, precipitation, Palmer drought index data for 344
- climate divisions of US. Data can be viewed in tabular or graphical format.
- Contact: National Climatic Data Center, Federal Building, Asheville, NC
- 28801. 704/259-0682.
-
- High Resolution Climatology ($199/variable): *COMMERCIAL* (Floppy disk)
- Average monthly climatological values [don't have info as to which
- variables] for every 1 square km of the conterminous US for the 30-year
- period 1951-1980. The data are stored as a rectangular matrix for each
- state. Digitized state and county political boundaries are included and
- referenced to the climate data sets. The data are in raster form as ASCII
- or 16-bit binary integers. This dataset is distributed on 5.25" or 3.5"
- floppy disks.
- Contact: ZedX, Inc., P.O. Box 404, Boalsburg, PA 16827-0404.
-
- B. Research data
-
- NMC gridpoint dataset ($150):
- Twice daily grids for the Northern Hemisphere at a resolution of about
- 381 km.
- Contact: National Center for Atmospheric Research, PO Box 3000, Boulder,
- CO 80307. 303/497-1219, email datahelp@ncar.ucar.edu.
-
- National Geophysical Data Center (NGDC) discs:
- Various discs available, including: ice and snow coverage, ocean sediment
- drilling data, ionospheric vertical soundings ($100), solar variability
- (sunspots, magnetic field data, flares, tree-ring data -- $100), geophysics
- of North America (earthquake data, magnetic fields, topography, gravity,
- geopolitical info -- $600), and more.
- Contact: NGDC, 325 Broadway, Boulder, CO 80303. 303/497-6958.
-
- Global Ocean Temperature and Salinity (2 discs, $80 each or $124/both)
- Temperature and salinity in the world ocean for about 1900-1990, based
- on all available XBTs, MBTs, BTs, etc.
- Contact: National Oceanographic Data Center, NOAA/NESDIS E/OC21,
- Washington, DC 20235. 202/673-5549.
-
- GALE and ERICA datasets (2 discs, price not known):
- GALE (Genesis of Atlantic Lows), 1/15/86-4/15/86: ship data, raobs,
- aircraft, radar, etc off N Carolina coast. ERICA (Experiment on Rapidly
- Intensifying Cyclones over the Atlantic), 12/1/88-2/26/89: rawinsondes,
- aircraft, radar, buoys, satellite data, etc.
- Contact: C. Kreitzberg, Dept. of Physics and Atmospheric Science,
- Drexel University, Philadelphia, PA 19104.
-
- GEDEX (Greenhouse Effect Detection Experiment)(price not known):
- Two discs containing surface, upper air, and/or satellite-derived
- measurements of temperature, solar irradiance, clouds, greenhouse
- gases, fluxes, albedo, aerosols, ozone, and water vapor, along with
- Southern Oscillation Indices and Quasi-Biennial Oscillation statistics.
- Many of the data sets provide global coverage. The spatial resolutions
- vary from zonal to 2.5 degree grids. Some surface station data sets
- span more than 100 years; most satellite-derived sets cover only the
- past 12 years. Temporal coverage is monthly for most sets. An update
- will be available by June 1992.
- Contact: NCDS/Goddard Distributed Active Archive Center, Code 935,
- Goddard Space Flight Center, Greenbelt, MD 20771. 301/286-3209, email
- NCDSUSO@NSSDCA.GSFC.NASA.GOV.
- A more complete description of these discs may be obtained from
- the ncardata.ucar.edu FTP site, in the file "catalogs/nondss/gedex".
-
- DMSP SSM/I Brightness Temperature Grids for the Polar Regions, volume 1-12,
- 9 July 1987 - 30 June 1990 (Price on request):
- Each volume contains 3 months of daily brightness temperature grids.
- Sensor is currently flying; one additional CD-ROM volume is produced
- approximately every 8 weeks. Passive microwave brightness temperatures
- (7 dual-polarized frequencies ranging from 19.3 to 85.5 GHz.), used
- primarily to derive sea ice concentration; Northern and Southern
- Hemispheres.
- Data format: 16-bit raster images (2-byte integers), in "SSM/I grid
- format".
- Associated software: Extraction and ice concentration software, IMDISP
- image display program for IBM PC, IMAGIC image display program for the
- Macintosh II. Software distributed on diskettes.
- Contact: World Data Center A for Glaciology [Snow and Ice], National Snow
- and Ice Data Center, University of Colorado, CIRES - Campus Box 449, Boulder,
- CO 80309. 303/492-5171, FAX 303/492-2468, email hanson@kryos.colorado.edu
- (Claire Hanson).
-
- DMSP SSM/I Ice Concentration Grids for the Polar Regions, Volume 1,
- 9 July 1987 - 31 December 1989 (Price on request):
- Contains sea ice concentration derived from SSM/I brightness
- temperatures, using NASA Team algorithm and J. Comiso algorithm,
- for Northern and Southern Hemispheres.
- Data format: 8-bit raster images (1-byte integers) in "HDF format"
- (software available via anonymous ftp from ftp.ncsa.uiuc.edu). Grid files
- have NASA PDS (Planetary Data System) header labels. Additional volumes
- will be produced, for the entire time series.
- Associated software: Source code used to derive ice concentration from
- brightness temperatures. IMDISP image display software. Software distributed
- on diskettes.
- Contact: World Data Center A for Glaciology, information above.
-
- Nimbus-7 SMMR Polar Radiances, Volumes 1-12, 25 October 1978 - 20 August
- 1987 (life of SMMR sensor) (Price on request):
- Contains passive microwave brightness temperatures (5 dual-polarized
- frequencies ranging from 6.6 to 37 GHz) and derived sea ice concentration
- for the Northern and Southern Hemispheres.
- Data format: 2-byte integers, in single-frequency grids.
- Associated software: IMDISP image display program (C code) for IBM PC;
- landmask and latitude/longitude overlay (Fortran). Software distributed on
- IBM PC diskettes.
- Contact: World Data Center A for Glaciology, information above.
-
- Eastern Arctic Ice, Ocean and Atmosphere Data, Volume 1, CEAREX-1 ($50):
- Contains sea ice acceleration, deformation and stress; hydrography
- (CTDs); meteorology; bathymetry; acoustics and ambient noise (sample
- data) from Coordinated Eastern Arctic Experiment (CEAREX). Includes
- meteorology from Marginal Ice Zone Experiment (MIZEX), 1983, 1984, 1987.
- Experiment location: Arctic Ocean north of Svalbard; Fram Strait, September
- 1988 - May 1989. Amount of data: 460 mbytes.
- Data format: ASCII files. Associated software: none. Additional volumes
- are planned; content not yet determined.
- Contact: World Data Center A for Glaciology, information above.
-
- NWS/NOHRSC Snow cover data (1990 and 1991, $200 each):
- Airborne snow water equivalent and satellite areal extent of snow cover
- data for 1990 and 1991 are now available on CD-ROM for major portions of the
- U.S. and southern Canada. The CD-ROMs include: (1) airborne snow water
- equivalent data and the digitized flight line network, (2) calibrated AVHRR
- and GOES satellite data used to map snow cover, (3) the classified snow cover
- images (4) national and regional snow cover image products, and (5) ancillary
- data sets including digital elevation data, digitized NWS basin boundaries,
- and the alphanumeric results of the satellite snow cover mapping by basin and
- by elevation zone.
- Contact: CD-ROM Snow Cover Data, National Operational Hydrologic Remote
- Sensing Center (NOHRSC), Office of Hydrology, National Weather Service,
- 6301 34th Avenue South: Room 112, Minneapolis, MN 55450-2985.
- 612/725-3258, FAX 612/725-3338, email tim@snow.nohrsc.nws.gov (Tim Szeliga)
-
- C. Miscellaneous
-
- NASA discs:
- Various discs available, including: Voyager spacecraft images (12 discs,
- under $20 each!), Viking images of Mars, Magellan Venus data, Halley's
- comet data (25 discs), excerpts from astronomical catalogs, and more.
- Contact: NSSDC (NASA Space Science Data Center), Code 933.4, NASA
- Goddard Space Flight Center, Greenbelt, MD 20771. 301/286-6695. They
- also publish a free newsletter.
-
- CD-ROM, INC: *COMMERCIAL*
- Several hundred discs available, including: "GRIPS 2" high resolution
- images of topography, Landsat, vegetation maps, plus software ($49),
- "JEDI" 3 discs full of earth, space, and sea science data intended for
- school use ($31), 13 business/economic discs, >50 literature and
- entertainment discs, >40 health-related discs, many science discs.
- Prices range from $29-$895. Free catalog available from them.
- Contact: CD-ROM, Inc, 1667 Cole Blvd. Suite 400, Golden, CO 80401.
- 303/231-9373, FAX 303/231-9581.
-
- Digital Chart of the World ($200):
- The Digital Chart of the World (DCW) is a comprehensive 1:1,000,000-scale
- vector basemap of the world containing cartographic, attribute, and
- textual data. It is provided with software that permits the database to
- be accessed, queried, and displayed on PC-class computers. The primary
- source for the database is the U.S. Defense Mapping Agency (DMA) Operational
- Navigation Chart (ONC) series.
- There are 4 discs: (1)North America, (2)Europe/Northern Asia, (3)South
- American/Africa/Antarctica, and (4)Southern Asia/Australia. The data are
- organized into 17 thematic coverages, including political boundaries and
- ocean coast lines, cities, transportation networks, drainage, land cover,
- and elevation contours.
- Contact: USGS Open File Section, Box 25286, Denver, CO 80225.
- 303/236-7476.
-
- ########################################################################
-
- Subject: Research data on tape and other media
-
- Carbon Dioxide Information Analysis Center (CDIAC):
- Research and distribution center for data related to carbon dioxide,
- methane, and other trace gas emissions; the carbon cycle; and other
- climate-change topics. You can access catalog information by FTP (see
- section I). Datasets are available on various media including CD-ROM and
- magnetic tape. They also publish a free newsletter.
- Contact: CDIAC, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge,
- TN 37831-6335. 615/574-0390, FAX 615/574-2232, email cdp@stc10.ctd.ornl.gov.
-
- NASA Space Science Data Center (NSSDC):
- Astronomical and atmospheric data. You can access catalog information by
- FTP or telnet (see section I).
- Contact: NSSDC, Code 933.4, NASA Goddard Space Flight Center, Greenbelt,
- MD 20771. 301/286-6695.
-
- National Center for Atmospheric Research (NCAR):
- Over 400 datasets available to the research community on various media.
- You can access catalog information by FTP (see section I).
- Contact: NCAR Data Support Section, PO Box 3000, Boulder, CO 80307.
- 303/497-1219, FAX 303/497-1137, email datahelp@ncar.ucar.edu.
- (DISCLAIMER: NCAR is a non-profit government organization operated by
- UCAR under a grant from the NSF. Our charges reflect the actual cost of
- data retrieval and magnetic media. I receive no benefit from you ordering
- data. Please, research-related inquiries only.)
-
- National Climatic Data Center (NCDC): NCDC, Federal Building, Asheville,
- NC 28801. 704/259-0682.
-
- National Geophysical Data Center (NGDC): NGDC, 325 Broadway, Boulder,
- CO 80303. 303/497-6958.
-
- ########################################################################
-
- Subject: Weather-related mailing lists
-
- 1. CLIMLIST (moderated by John Arnfield)
-
- CLIMLIST is a moderated electronic mail distribution list for climat-
- ologists and those working in closely-related fields. It is used to
- disseminate notices regarding conferences and workshops, data avail-
- ability, calls for papers, positions available etc, as well as requests
- for information. An updated directory of email addresses for the
- subscribers to the list is distributed every month (usually on the 15th).
- To subscribe, mail to whichever of these addresses works for you:
- AJA+@OHSTMAIL.BITNET / aja+@osu.edu / johna@magnus.acs.ohio-state.edu
- with the following information:
- Your name (for directory listing), email address, institutional affiliation;
- Indicate if your email address is shared, so your name will be in header
- of messages.
- If your 'climatological credentials' are not apparent from your
- affiliation, please explain.
-
- 2. Weather-users (administered by scott@zorch.sf-bay.org)
-
- This list is for discussions of weather servers; sharing of code to
- automatically query weather servers; and announcements of availability
- (or lack thereof) and changes to weather servers. Initially, Jeff Masters
- (sdm@madlab.sprl.umich.edu) has agreed to send Weather Underground status
- notices to this list.
- To join or quit the list, email to weather-users-request@zorch.sf-bay.org;
- the list mail address is weather-users@zorch.sf-bay.org.
-
- 3. WX-TALK and other WX-lists
-
- WX-TALK, formerly STORM-L, is a mailing list for weather-related topics,
- special event notifications, job announcements, and administrative
- messages. This list, and other specialized weather-related lists, are
- run from the vmd.cso.uiuc.edu (UIUCVMD) machine at Urbana-Champaign,
- Illinois. WX-TALK is for discussions and questions; the others are intended
- to distribute information on particular topics, but you should not
- post mail to them.
- To join the list, send a message consisting of the single line
- SUB WX-TALK Your Name
- to whichever of these addresses works for you:
- LISTSERV@UIUCVMD / LISTSERV@UIUCVMD.BITNET / LISTSERV@VMD.CSO.UIUC.EDU
- or uiucuxc!vmd!listserv from uucp.
- Contributions should then go to WX-TALK@[working address]
- For more information, and a list of the other WX-lists on vmd.cso.uiuc.edu,
- use anonymous FTP to retrieve the file WX-TALK.DOC from vmd.cso.uiuc.edu
- in the directory "wx".
-
- 4. Wxsat (administered by Richard B. Emerson)
-
- Wxsat resends all NOAA/NESDIS bulletins on polar and geostationary weather
- satellites as well as occasional material on Meteosat. Bulletins with
- orbital predictions, spacecraft operation schedules, and related messages
- are copied from NOAA.SAT on SCIENCEnet and forwarded to all addresses on
- the list. The list is configured to accept and broadcast mail from
- subscribers to the list at large. Wxsat does not store or distribute imagery
- and is not primarily a "chat" list. Wxsat is oriented towards users with a
- daily operational need for TBUS and related bulletins.
- An archive of roughly 60 days' messages are available for retrieval via
- email messages to wxsat-archive@ssg.com. Send the message "help" in the
- text to the archive server for details on how to retrieve the current index
- and other files.
- Subscription requests go to wxsat-request@ssg.com. The service is free
- to all Internet users but donations are accepted as this is a volunteer
- operation.
-
- ########################################################################
-
- From rlb@lavalite.asd.sgi.com Mon Nov 16 16:45:41 1992
- Received: from sgi.sgi.com (SGI.COM) by amelia.nas.nasa.gov (5.61/1.34)
- id AA11463; Mon, 16 Nov 92 16:45:41 -0800
- Received: from relay.sgi.com by sgi.sgi.com via SMTP (920330.SGI/910110.SGI)
- for eugene@amelia.nas.nasa.gov id AA14094; Mon, 16 Nov 92 16:45:31 -0800
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- for @sgi.sgi.com:eugene@amelia.nas.nasa.gov id AA10819; Mon, 16 Nov 92 16:45:29 -0800
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- Date: Mon, 16 Nov 92 16:45:25 -0800
- From: rlb@lavalite.asd.sgi.com (Bob Brown)
- Message-Id: <9211170045.AA12827@lavalite.asd.sgi.com>
- To: eugene@amelia.nas.nasa.gov (Eugene N. Miya)
- Subject: Re: [l/m 10/15/1992] Shell (1/4) c.g.v.FAQ
- Status: R
-
- Gene,
- You list "other platforms" for IBM Explorer. You might list for
- my Explorer that we have contracted with NAG, Ltd., to do DEC, IBM,
- HP, and SPARC ports, that the SPARC port was demo'd at Siggraph'92,
- and that we have announced agreements with Intel (Paragon) and
- Kendal Square Research. Also, DuPont Pixel will be offering it soon
- on their systems, which are GL accellerators for SPARC machines.
-
- Never did get over to see the ruskie transport; Friday was our
- wrap-up day for 2.0 beta.
-
- Bob
- ---------------
- Robert L. Brown
- Silicon Graphics, Inc.
-
-
-
-
- Article 973 of comp.graphics.avs:
- Xref: data.nas.nasa.gov comp.graphics.visualization:2817 comp.graphics.avs:973
- Newsgroups: comp.graphics.visualization,comp.graphics.avs
- Path: data.nas.nasa.gov!ames!agate!stanford.edu!leland.Stanford.EDU!baroque.Stanford.EDU!jim
- From: jim@baroque.Stanford.EDU (James Helman)
- Subject: Re: References to visualizing 2nd Order Tensors. . .
- In-Reply-To: gardner@convex.com's message of Mon, 30 Nov 1992 03:10:05 GMT
- Message-ID: <JIM.92Nov30001230@baroque.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: Stanford University
- References: <1992Nov30.031005.27606@news.eng.convex.com>
- Date: 30 Nov 92 00:12:30
- Lines: 23
-
- While he was at Visual Edge, Rob Dickinson did some work tracing
- curves through the direction fields of the major and minor
- eigenvectors of 2nd order tensor fields. His application was also
- stress and strain, and the method appeared quite effective. I'm not
- sure, but it might be described in his paper:
-
- @ARTICLE{Dick91a,
- AUTHOR = "Robert R. Dickinson",
- Title = "Interactive Analysis of the Topology of 4d Vector Fields",
- JOURNAL = "IBM Journal of Research and Development",
- MONTH = Jan,
- VOLUME = 35,
- NUMBER = 1,
- PAGES = "59-66",
- YEAR = 1991}
-
- Jim Helman SGI: (415) 390-1151
- jimh@surreal.asd.sgi.com FAX: (415) 591-8165
- jim@KAOS.stanford.edu
-
- "The power of the computer is locked behind a door with no knob."
- -B. Laurel
-
-
-
- Article 980 of comp.graphics.avs:
- Xref: data.nas.nasa.gov comp.graphics.visualization:2825 comp.graphics.avs:980
- Newsgroups: comp.graphics.visualization,comp.graphics.avs
- Path: data.nas.nasa.gov!mustang.mst6.lanl.gov!nntp-server.caltech.edu!elroy.jpl.nasa.gov!usc!zaphod.mps.ohio-state.edu!caen!uunet!seas.gwu.edu!favre
- From: favre@seas.gwu.edu (Jean Favre)
- Subject: Re: References to visualizing 2nd Order Tensors. . .
- Message-ID: <1992Nov30.144600.468@seas.gwu.edu>
- Organization: George Washington University
- References: <1992Nov30.031005.27606@news.eng.convex.com> <1fcb2qINN9o7@fido.asd.sgi.com>
- Date: Mon, 30 Nov 1992 14:46:00 GMT
- Lines: 23
-
- >In article <1992Nov30.031005.27606@news.eng.convex.com>, gardner@convex.com writes:
- >> Can anyone give me any pointers to references in the literature on the
- >> visualization of 2nd order tensors? We have implemented an AVS
-
- You may also try the following paper:
-
- @INPROCEEDINGS{Delm92,
- AUTHOR = "Thierry Delmarcelle and Lambertus Hesselink",
- TITLE = "Visualization of Second Order Tensor Fields and Matrix Data",
- BOOKTITLE = "Visualization'92",
- ORGANIZATION = "IEEE Computer Society",
- YEAR = 1992,
- MONTH = Oct,
- PAGES = "316--323"
- }
-
- Hope this helps.
-
-
- --
- Jean M. Favre. EE&CS Dept. The George Washington University
- (202) 994 5917
- favre@seas.gwu.edu
-
-
- From ken@pi1.arc.umn.edu Tue Dec 22 07:10:46 1992
- Received: from mail.unet.umn.edu by amelia.nas.nasa.gov (5.61/1.34)
- id AA26967; Tue, 22 Dec 92 07:10:46 -0800
- Received: from a1.arc.umn.edu by mail.unet.umn.edu (5.65c/)
- id AA21077; Tue, 22 Dec 1992 09:10:38 -0600
- Received: by a1.arc.umn.edu; Tue, 22 Dec 92 09:10:35 CST
- Received: by pi1.arc.umn.edu (920330.SGI/920502.SGI)
- for @a1.arc.umn.edu:eugene@amelia.nas.nasa.gov id AA16499; Tue, 22 Dec 92 09:10:33 -0600
- Date: Tue, 22 Dec 92 09:10:33 -0600
- From: ken@pi1.arc.umn.edu (Ken Chin-Purcell)
- Message-Id: <9212221510.AA16499@pi1.arc.umn.edu>
- To: eugene@amelia.nas.nasa.gov (Eugene N. Miya)
- Reply-To: ken@a1.arc.umn.edu
- Subject: Re: [l/m 8/10/1992] Shell2 -- the outrigger (2/4) c.g.v.FAQ2
- Status: R
-
-
- In article <1992Dec22.124511.23669@nas.nasa.gov>, you write:
-
- |> "Feed me."
- |> Systems
-
- ---------------------------------------------------------
- GVLware Distribution:
- Bob - An interactive volume renderer for the SGI
- Raz - A disk based movie player for the SGI
- Icol - Motif color editor
- ---------------------------------------------------------
-
- The Army High Performance Computing Research Center (AHPCRC) has been
- developing a set of tools to work with large time dependent 2D and 3D
- data sets. In the Graphics and Visualization Lab (GVL) we are using
- these tools along side standard packages, such as SGI Explorer and the
- Utah Raster Toolkit, to render 3D volumes and create digital movies.
- A couple of the more general purpose programs have been bundled into a
- package called "GVLware".
-
- GVLware, currently consisting of Bob, Raz and Icol, is now available
- via ftp. The most interesting program is probably Bob, an interactive
- volume renderer for the SGI. Raz streams raster images from disk to
- an SGI screen, enabling movies larger than memory to be played. Icol
- is a color map editor that works with Bob and Raz. Source and
- pre-built binaries for IRIX 4.0.5 are included.
-
- To acquire GVLware, anonymous ftp to:
- machine - ftp.arc.umn.edu
- file - /pub/gvl.tar.Z
-
- To use GVLware:
- mkdir gvl ; cd gvl
- zcat gvl.tar.Z | tar xvf -
- more README
-
- Some Bob features:
- Motif interface, SGI GL rendering
- Renders 64 cubed data set in 0.1 to 1.0 seconds on a VGX
- Alpha Compositing and Maximum Value rendering, in perspective
- (only Maximum Value rendering on Personal Iris)
- Data must be a "Brick of Bytes", on a regularly spaced grid
- Animation, subvolumes, subsampling, stereo
-
- Some Raz features:
- Motif interface, SGI GL rendering
- Loads files to a raw disk partition, then streams to screen
- (requires an empty disk partition to be set aside)
- Script interface available for movie sequences
- Can stream from memory, like NCSA XImage
-
- Some Icol features:
- Motif interface
- Easy to create interpolated color maps between key points
- RGB, HSV and YUV color spaces, multiple file formats
- Communicates changes automatically to Bob and Raz
- Has been tested on SGI, Sun, DEC and Cray systems
-
- BTW: Bob == Brick of Bytes
- Icol == Interpolated Color
- Raz == ? (just a name)
-
- Please send any comments to
- gvlware@ahpcrc.umn.edu
-
- This software collection is supported by the Army Research Office
- contract number DAALO3-89-C-0038 with the University of Minnesota Army
- High Performance Computing Research Center.
-
-
- Ken Chin-Purcell -- Graphics, AHPCRC, University of Minnesota
- a.k.a. ken@ahpcrc.umn.edu and 612/626-8075
- (and now back to Moose & Squirrel...)
-
-