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 MapPlot by Matt Kruse <matt.com>
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This is a simple routine to return X,Y coordinates on the included
US Map, given Latitude and Longitude.

The calculations made in the GetXY() subroutine were generated by
a few hours of work with the image itself. I had no other data than
the image file and had to use reference points and lots of 
Trigonometry to generate the equations and numbers by hand. Trust
me, it was not a quick or easy task :)

Some notes:

1) This routine will ONLY work for the given map.

2) The example file uses GD.pm to draw on the map. You must have
   an older version of GD which can manipulate GIF files in order
   to do this test. If you don't, you should convert it to use
   PNG instead.

3) The file "cities.txt" contains nearly 24,000 cities and their
   Latitude/Longitude locations. This information was pulled from
   a file made available from results of the 1990 census. You can
   use this to map city locations.

4) The example.gif file is the output of the example script and
   shows all locations included in the cities.txt file.

5) No support will be given for these routines. Use them as you
   wish under the same license as Perl itself.