| Re: meteosat 9 map_set limit [message #64595] |
Thu, 08 January 2009 06:18 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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alexandru.dumitrescu@gmail.com writes:
> I am trying to set limits for one meteosat 9 satellite image in order
> to overlay coastlines using map_set command. It seems that something I
> am doing wrong because the coastlines don't fit well on the pictures.
> Does everyone know how to set the limits for that kind of image?
I've pretty much lost confidence in the MAP_SET command to
do anything exactly right, but there are all kinds of reasons
you could be having trouble. I was experiencing this problem
just the other day. The problem turned out that the published
corners of the image (on my employers web site, alas!) were
only approximately correct. GIGO. When I calculated the
image limits myself, as in the articles below, everything
fell into place.
But here are a couple of articles to start you thinking
about the problem, if not exactly solving it.
http://www.dfanning.com/map_tips/tiffoverlay.html
http://www.dfanning.com/map_tips/precipmap.html
Let us know is you have a more specific question.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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