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Re: map_set stereographic projection [message #48516 is a reply to message #48507]

Thu, 27 April 2006 07:23

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

dvila writes:

> I'm trying to deal with a pre-projected polar stereographic image with
> this geometrical characteristics:
>
> # It is a 1121x881 polar stereographic grid.
> # Point (1,1) is at 23.117N 119.023W.
> # Point (1,881) is at 53.509N 134.039W.
> # Point (1121,1) is at 19.805N 80.750W.
> # Point (1121,881) is at 45.619N 59.959W.
> # The y-axis is parallel to 105W.
> # The resolution is 4.7625km at 60N.
> # The pole point is (I,J) = (400.5,1600.5)
>
> I don't know how may I set the map_set routine to fit the map with the
> data. Is it possible to work with pre-projected data?

On occasion. See, for example:

http://www.dfanning.com/map_tips/georeference.html

> On the other hand, can I change the projection to a regular lat-lon
> grid in IDL?

Probably not. :-)

I don't know the definitive answers to these questions, but
I have a reason to find out. Where can I find one of these
images you are trying to fit a map projection to?

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: map_set stereographic projection By: David Fanning on Fri, 28 April 2006 07:24
		Re: map_set stereographic projection By: James Kuyper on Fri, 28 April 2006 06:40
		Re: map_set stereographic projection By: David Fanning on Fri, 28 April 2006 06:35
		Re: map_set stereographic projection By: peter.albert@gmx.de on Fri, 28 April 2006 05:08
		Re: map_set stereographic projection By: dvila on Fri, 28 April 2006 04:23
		Re: map_set stereographic projection By: peter.albert@gmx.de on Fri, 28 April 2006 01:33
		Re: map_set stereographic projection By: dvila on Thu, 27 April 2006 12:29
		Re: map_set stereographic projection By: David Fanning on Thu, 27 April 2006 12:14
		Re: map_set stereographic projection By: dvila on Thu, 27 April 2006 11:51
		Re: map_set stereographic projection By: David Fanning on Thu, 27 April 2006 07:23
		Re: map_set stereographic projection By: peter.albert@gmx.de on Tue, 02 May 2006 00:56
		Re: map_set stereographic projection By: mattie on Fri, 28 April 2006 09:58

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