McIDAS Programmer's Manual
Version 2003
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OUTL*
Base map files, where * is the map file name.
These variable-length, binary files contain the base map data for drawing graphical map outlines. The map files and their descriptions are provided in the table below.
|
Map file
|
Description
|
|
OUTLSUPU
|
high resolution USA
|
|
OUTLSUPW
|
world coastal
|
|
OUTLUSAM
|
medium resolution USA
|
|
OUTLHPOL
|
world political boundaries
|
|
OUTLHRES
|
high resolution world coastal outline
|
|
OUTLUSAL
|
low resolution USA and North America
|
|
OUTLWRLD
|
world coastal
|
Word allocation for OUTLSUPU, OUTLSUPW, OUTLUSAM, OUTLHPOL and OUTLHRES
Words 1 to 6000 contain the directory for the line segments. Each directory block contains six words of information.
|
Word
|
Description
|
|
0
|
number of blocks (line segments)
|
|
1
|
minimum latitude, degrees * 10000
|
|
2
|
maximum latitude, degrees * 10000
|
|
3
|
minimum longitude, degrees * 10000; west is positive
|
|
4
|
maximum longitude, degrees * 10000; west is positive
|
|
5
|
beginning word of data start for segment 1
|
|
6
|
number of words to read
|
|
7 - 12
|
directory for line segment 2
|
|
...
|
...
|
|
5995 - 6000
|
directory for line segment 1000
|
|
6001
|
latitude degrees * 10000
|
|
6002
|
longitude degrees * 10000
|
|
6003
|
latitude degrees * 10000
|
|
6004
|
longitude degrees * 10000
|
|
...
|
...
|
The maximum number of line segments is 1000. The number of points in a segment is limited to 3000 by the arrays in the MAP program.
Word allocation for OUTLUSAL and OUTLWRLD
|
Word
|
Description
|
|
0 . . . n-1
|
n number of
latitude/longitude pairs as halfwords; longitude, degrees * 10, 0 to 360 west
is positive; latitude, degrees * 20,
0 to 180 north is positive; odd number means pen down; even number means pen
up
|
|
n + 1
|
end of file marker; HEX FFFF0000
|
API functions
Currently, no API library functions exist for reading and writing base map files. There are, however, programs in McIDAS-XRD, MAKEMAP and MAP2TEXT, that convert McIDAS map files to and from a text format.
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