| Re: Map projection in ENVI [message #71294] |
Wed, 09 June 2010 04:04  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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kamal writes:
> Some distorted type of image. The lat/lon vlaues and the parameter
> values are all assigned to each pixel but the image seems to be, I
> don't know, not correct.
There is probably much in ENVI to improve, but
personally, I feel great confidence in their map
projection software. At least in my case, every
time I have tried to confirm a result that seemed
"strange" to me, the problem turned out to be a
faulty assumption or incomplete knowledge on my
part, rather than a problem with the software.
> Is it possible to regrid the coarse resolution to a higher resolution
> using some interpolation method in ENVI (not in IDL!) and also change
> the map projection?
Regrid to a higher resolution using what information?
If you start with low resolution data, producing high
resolution output is imaginary art, not science. :-)
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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| Re: Map projection in ENVI [message #71359 is a reply to message #71294] |
Fri, 11 June 2010 08:22  |
kamal
Messages: 12
Registered: June 2010
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Junior Member |
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On Jun 9, 4:04 pm, David Fanning <n...@dfanning.com> wrote:
> There is probably much in ENVI to improve, but
> personally, I feel great confidence in their map
> projection software. At least in my case, every
> time I have tried to confirm a result that seemed
> "strange" to me, the problem turned out to be a
> faulty assumption or incomplete knowledge on my
> part, rather than a problem with the software.
>
> Regrid to a higher resolution using what information?
> If you start with low resolution data, producing high
> resolution output is imaginary art, not science. :-)
>
> 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.")
Thank you so much for your reply David. The original data is in
~1.8X1.8 degree spatial resolution in geographic lat/lon projection. I
want to reproject it into polar stereographic projection (North) so
that I can compare it with the AMSR-E L3 gridded data (which are in
polar stereographic projection).
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