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Re: Display of topo map in MAP routines. [message #68040 is a reply to message #68039]

Tue, 22 September 2009 12:22

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Paul van Delst writes:

> Can someone outline (real quick) the steps needed to display a topo map in the background
> of a map projection? Other point data will be overplotted over this background.

Do you really mean "topo map"? If you do, I'm not sure
there *is* a quick way to do this. Maybe if you could
get ahold of a digital topo map in GeoTIFF format you
might be OK. But even the smallest topo map is going to
be HUGE and difficult to work with. I have a topo map of
Canyonlands National Park in front of me on the wall.
It's about 3 by 4 feet. I hate to think what size it would
be in digital format. :-(

> Does a DEM file come with IDL, or do I need to visit the USGS?

IDL does not come with a DEM file. Is this what you
mean by a "topo map"?

Maybe you could clarify what you are trying to do,
including some explanation of the tools you plan to
use. I have a feeling you are asking about building
a 18,000 sq ft dream home, but have the plans for a
dog house in front of you. :-)

Cheers,

David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Display of topo map in MAP routines. By: Paul Van Delst[1] on Tue, 22 September 2009 13:56
		Re: Display of topo map in MAP routines. By: Kenneth P. Bowman on Tue, 22 September 2009 13:41
		Re: Display of topo map in MAP routines. By: Paul Van Delst[1] on Tue, 22 September 2009 13:39
		Re: Display of topo map in MAP routines. By: David Fanning on Tue, 22 September 2009 12:22

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