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On Fri, 01 Mar 2002 09:15:21 -0500, "Timothy R. Cook"
<tim### [at] scifi-fantasy com> wrote:
> Problem with this is the Terraserver/USGS topographic maps aren't just
> the
> elevation lines. They also have a red grid, roads, green areas for
> trees,
> black boxes for buildings, labels for things, et cetera.
What the problem to fill all pixels with color different to elevation lines
with background color first. It should be easy possible with any image
manipulation software. IIRC it was possible even with paint in windows.
ABX
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