| Re: Read Envi File under IDL and Display within TVSCL [message #56662] |
Wed, 07 November 2007 10:37 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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a.lucas@geolnet.net writes:
> I am looking for a method to read envi data programmatically with IDL
> but whitout using any "ENVI_OPEN_FILE" (and everything).
> I would like to read for instance two files (1/ DTM 2/ Sat. Image) and
> then get them in a single display called by something like TVSCL.
> Afterward, things gonna be tricky, I would like to get "GEO" linked
> between my both files. There are already georeferenced in the same
> sytem...but pixel resolution are not necessary the same. I thus have
> *.hdr for each.
>
> The final idea, is to developpe a Widget, which could allow user to
> determine ROI on the one of the two files and then get this ROI on the
> other.
>
> The ENVI-independant requierement, is for exporting code to plateforms
> without ENVI installed.
Well, good luck. What you have going for you is knowing that
ENVI is written in IDL, so you know it is possible. What you
may NOT have going for you is experience reading satellite
data files, working with widgets and ROIs, writing programs
that run on multiple platforms, etc. The reason most people
shell out the big bucks for ENVI is that time is money. :-)
If you've got plenty of the former, then probably most of
what you need to know can be found on the web site below or
in one or another of the books referenced there. We might
even be able to help here if you get to the point where
you can come up with a specific question.
Cheers,
David
P.S. I presume you may be lacking in IDL experience because
of the reference to TVSCL. That would be the *last* command
I would think of using if I were going to be tackling something
like this. :-)
--
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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