| Re: Overlay images from WMS servers (web mapping servers) on map projections [message #47463 is a reply to message #47435] |
Fri, 10 February 2006 10:35   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Liam writes:
> Sorry for the delay; I got busy with some other tasks.
What!? Oh, ok. :-)
> I was initially equally frustrated with MAP_PROJ_INIT, however that
> changed when Ben Tupper posted some very good instructions on how to
> use it.
I should have known Tupper was behind this. Where is he,
anyway? He hasn't exactly been weighing in on this discussion.
He probably wants to *sell* all that knowledge!
> Since then, I've had success in using MAP_PROJ_INIT to
> establish map projections which match up with GeoTIFF satellite images.
> I've created a brief example which is available at
>
> ftp://ftp.ssec.wisc.edu/pub/gumley/IDL/geotiff/
Uh, well.... Is it my imagination, or does that shoreline not
quite line up with the shore?
I think I am beginning to see the problem. My expectations
are WAY too high! :^)
> I like MAP_PROJ_INIT and the related functions precisely because they
> are decoupled from the graphics device. I think the potentially weak
> link comes when you have to transfer the projection to the graphics
> device (i.e., the PLOT call).
I agree with this. They work GREAT in theory!
> That said, I'd love to hear other examples of how people are using
> MAP_PROJ_INIT, particularly in conjunction with georegistered satellite
> images.
Yes, me, too. I'm sure I'm going to learn a lot. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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