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Re: MAP_SET vs MAP_PROJ_* [message #42553 is a reply to message #41671]

Wed, 16 February 2005 14:15

KM
Messages: 29
Registered: October 2004

Junior Member

On Wed, 16 Feb 2005, Gadhavi wrote:
> I am looking for a way to change the map projection for the data
> given in one projection. It seems that it is straight forward job
> with Map_proj_image routine but unfortunately I am still using
> older version of IDL (5.6) in which this routine is not available.
> I will highly appreciate it if some one can show way out from the
> problem I have mentioned in my earlier message. Even reference to
> the similar post will do.

Hi Gadhavi,

I've noticed the silent non-replies to your questions. This
newsgroup is usually very helpful, so I think maybe you cannot do
what you want easily. I can think of a few options:

1) Take the MAP_PROJ_* routines from an IDL 6.1 install and get them
working in 5.6. Maybe this just involves compiling them, maybe it is
impossible.

2) Upgrade to 6.0 or 6.1 or whatever version supports your routines
Note that if you just need to convert 1 file 1 time or something
like that, maybe you could do all the required work in < 7 minutes.
If this is the case, you can do it with the free demo/trial version.
I think writing to files is disabled, but print your data to screen,
then cut and paste.

3) Find the equations to convert from your current projection
(Integerized Sinusoidal projection?), and then hand-code a reverse
lookup, or hand-code a conversion from that to a projection that is
easier to deal with (Cylindrical/Equirectangular).

4) Find a different piece of software to solve your problem. If you
want/need to use IDL for other parts, then do suggestion 3 with
different software, then continue in IDL.

Good luck,

-k.
http://spacebit.dyndns.org/

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[Message index]

		MAP_SET vs MAP_PROJ_* By: KM on Wed, 10 November 2004 08:09
		Re: MAP_SET vs MAP_PROJ_* By: Gadhavi on Wed, 09 February 2005 21:15
		Re: MAP_SET vs MAP_PROJ_* By: Gadhavi on Wed, 16 February 2005 08:02
		Re: MAP_SET vs MAP_PROJ_* By: btt on Tue, 08 February 2005 10:01
		Re: MAP_SET vs MAP_PROJ_* By: KM on Wed, 16 February 2005 14:15
		Re: MAP_SET vs MAP_PROJ_* By: savoie on Thu, 17 February 2005 10:18

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