| Are you asking
- How WE created the existing backdrops?
- How we expected others to create them?
- How some others have created them?
- How Vector maps are constructed in general?
We took some public domain data and munged it to the format used
in mapfiles. No tools, just a hacker and some time...
I don't know what we expected others to use. Clearly this was not
addressed in the product at all. I guess it was hoped (the people
who had these hopes and made these decisions are long gone) that
someone would either discover or invent a tool to do it.
Some people have used Autocad(tm) to produce files in DFX format
and then converted them with a tool, DXF2MAP.EXE, which has been
mentioned here in the notesfile.
Vector maps are just pairs of coordinats for the points that are
joined by lines. A simple map may only have a dozen or so points.
In our maps, the first point and the last must be the same in order
for it to be a closed polygon and therefore, filled.
s/rob
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