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- DEVICE FILES
- ============
-
- Device files control the appearance of maps:
-
- . polygon colours and type of fill
- . text colours, sizes and fonts
- . line colours and styles
- . sequences of class colours or hatch patterns
- . menu and message colours
-
- Experience showed that it is better to have fixed sets of definitions rather
- than allow the user to specify the display parameters.
-
- Remember that the basic display definition (number of pixels, lines and colours)
- was specified when configuring the system.
-
- The best way to understand device files is to look at the contents:
-
- At the main OzGIS menu.........
-
-
- Select the option to CHANGE DEVICE FILE
-
- Give the file as *C16SV1
-
- Select the option to DISPLAY DEVICE CHARACTERISTICS
-
- You will now get a display that shows the text types (sizes and colours),
- line (types and colours) and the various polygon fills as rectangles.
-
- Of particular interest are the class colours. The bottom set is a sequence of
- 121 colours which is designed to give the appearance of increasing attribute
- values. In this device file for a 16 colour board the colours are in blocks,
- but for 256 colour boards all the colours will be different (and can be used
- for "continuous colour" maps). The set of colours above are a 7 x 7 set for
- bivariate maps. They actually map onto the same set as for single variate maps,
- so if bivariate maps are to be produced different device files should be used.
-
- Now choose a bivarite device file *C16BV1 and display that. The bivariate
- sequence will show a progression of colour in each dimension.
-
- There is a set of files for 16 colour displays, *C16SV1 to *C16SV9 for single
- variate maps, and *C16BV1 to *C16BV3 for bivariate maps.
-
-
- There is also a set of files *C256SV1 to *C256SV9 and *C256BV1 to *C256BV3 for
- 256 colour boards. If you have a suitable board display one of these. The
- colour sequence will now be complete.
-
-
- Other device files are also available, primarily for display on printers and
- plotters, but these can also be used on the display; try them!
-
- *HATCHSV1 is for display of hatched single variate maps and *HATCHBV1 for
- bivariate maps.
-
- You should now display a few of the single variate decvice files (*C16sv? or
- *C256SV?) and decide on one that you will use as the default file.
-
- When you have decided on the default file type F10 to exit from OzGIS and:
-
- cd \ozgis
- copy C256SV6.DEV DEFAULT.DEV (using the file you have chosen)