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- 1_README.TXT
-
-
- Sea-Floor Images and Data from Multibeam Surveys in
- San Francisco Bay, Southern California, Hawaii, the
- Gulf of Mexico, and Lake Tahoe, California-Nevada
-
-
- By
- Peter Dartnell and James V. Gardner
-
-
- Digital Data Series DDS-55
-
-
- 1999
-
-
- U.S. DEPARTMENT OF THE INTERIOR
- BRUCE BABBITT, Secretary
-
-
- U.S. GEOLOGICAL SURVEY
- Charles G. Groat, Director
-
-
- ISBN: 0-607-92491-8
-
-
- For sale by U.S. Geological Survey, Information Services,
- National Mapping Division
- Box 25046
- Denver Federal Center
- Denver CO. 80225-0046
- Telephone (888) ASK-USGS
-
-
-
- QUICK START
-
-
- Most computers with web browsers can read this CD-ROM,
- including, PC's running Windows 95 or higher, or Windows
- NT4.0 or higher, UNIX, and Macintosh. First, start the
- web browser and then open the "index.htm" file in the top
- directory of this CD-ROM.
-
- INTRODUCTION
-
-
- Accurate base maps are a prerequisite for any geologic
- study, regardless of the objectives. Land-based studies
- commonly utilize aerial photographs, USGS 7.5-minute
- quadrangle maps, and satellite images as base maps. Until
- now, studies that involve the ocean floor have been at a
- disadvantage due to an almost complete lack of accurate
- marine base maps. Many base maps of the sea floor have been
- constructed over the past century but with a wide range in
- navigational and depth accuracies.
-
- Only in the past few years has marine surveying technology
- advanced far enough to produce navigational accuracy of 1
- meter and depth resolutions of 50 centimeters. The Pacific
- Seafloor Mapping Project of the U.S. Geological Survey╒s,
- Western Coastal and Marine Geology Program, Menlo Park,
- California, U.S.A., in cooperation with the Ocean Mapping
- Group, University of New Brunswick, Fredericton, Canada,
- is using this new technology to systematically map the
- ocean floor and lakes. This type of marine surveying,
- called multibeam surveying, collects high-resolution
- bathymetric and backscatter data that can be used for
- various base maps, GIS coverages, and scientific
- visualization methods.
-
- This is an interactive CD-ROM that contains images, movies,
- and data of all the surveys the Pacific Seafloor Mapping
- Project has completed up to January 1999. The images and
- movies on this CD-ROM, such as shaded relief of the
- bathymetry, backscatter, oblique views, 3-D views, and
- QuickTime movies help the viewer to visualize the multibeam
- data. This CD-ROM also contains ARC/INFO export (.e00) files
- and full-resolution TIFF images of all the survey sites that
- can be downloaded and used in many GIS packages.
-
-
- DISCLAIMERS
-
-
- This Compact Disc-Read Only Memory (CD-ROM) publication was
- prepared by an agency of the United States Government.
- Neither the United States Government nor any agency thereof,
- nor any of their employees, makes any warranty, expressed or
- implied, or assumes any legal liability or responsibility for
- the accuracy, completeness, or usefulness of any information,
- apparatus, product, or process disclosed in this report, or
- represents that its use would not infringe privately owned
- rights. Reference therein to any specific commercial product,
- process, or service by trade name, trademark, manufacturer,
- or otherwise does not necessarily constitute or imply its
- endorsement, recommendation, or favoring by the United States
- Government or any agency thereof.
-
- Although all data and software published on this CD-ROM have
- been used by the USGS, no warranty, expressed or implied, is
- made by the USGS as to the accuracy of the data and related
- materials and (or) the functioning of the software. The act
- of distribution shall not constitute any such warranty, and
- no responsibility is assumed by the USGS in the use of this
- data, software, or related materials.
-
-
- SYSTEM REQUIREMENTS
-
- Compatible computers (all computers must have a CD-ROM
- drive and capable of displaying at least 256 colors):
-
- -- UNIX
-
- -- Macintosh with a 68020 or higher processor (PowerPC
- recommended)
-
- -- IBM-compatible computers running Windows 95 or higher
- or NT4.0 or higher with a 386 or higher processor
- (Pentium recommended).
-
- Software:
-
- -- Most Web browsers
-
- -- ARC/INFO, or ARCVIEW with Spatial Analyst, or any GIS
- software that is capable of importing ARC/INFO
- export (.e00) files.
-
- -- Any image-processing software capable of importing
- TIFF images.
-
- This CD-ROM was produced in accordance with the ISO 9660 Level 2
- and Macintosh HFS standards.
-
-
- TO GET STARTED:
-
- Open the web browser on the computer. Under "Open File", open
- the "index.htm" file in the top directory of this CD-ROM.
- Navigate through the different survey areas by choosing the
- areas of your choice. View images of the ocean and lake
- floors by clicking on the various buttons. Load the Arc/Info
- export files, or TIFF images to your computer by clicking on
- the appropriate file name in the "Download Data" page.
-
-
- FILES ON CD-ROM
-
- 1_README.TXT File
- HTML files
- GIF Images
- QuickTime Movies
- ARC/INFO Export files
- metadata
- TIFF Images
- gzip decompression utility
-