Generating maps on demand can be a hard job as most often you don't
have the maps you need in digital form. But you can generate your own
maps based on raw, digital data description files which are available
for free on the net. This package provides a parser for the most
common format for geographical data, the Arcinfo/E00 format as well as
renderers to produce images using GD or Scalable Vector Graphics
(SVG).