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Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times [message #77494 is a reply to message #77491]

Fri, 02 September 2011 15:09

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Martin Landsfeld writes:

> I am remapping some GeoCover imagery to conform to our SRTM data. The
> GeoCover is in the UTM projection at 28.5 meters and the SRTM is in a
> Geographic projection at 0.0008333 degree resolution. I can do the
> conversion interactively in ENVI and it takes about 67 seconds. The
> files are large with:
>
> SRTM at 7208 x 9608 pixels
> GeoCover at 26857x19517 pixels
>
> I would like to run the conversions in IDL using the batch ENVI
> function ENVI_CONVERT_FILE_MAP_PROJECTION but when I do, it takes
> nearly 2 hours to process the same files on the same machine, a
> Windows 2008 Server with 4, 2.2GHz. Quad-Core processors and 32GB RAM.

I seriously doubt you are doing anything wrong. But, it
has been my experience that ENVI does not use its own
API. So, the way they do things internally, and the
way they tell you to do them programmatically are
really two different things. It wouldn't surprise me
to find this is one of those cases.

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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[Message index]

		Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times By: Allard de Wit on Tue, 06 September 2011 00:16
		Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times By: devin.white on Sat, 03 September 2011 05:35
		Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times By: Maxwell Peck on Fri, 02 September 2011 16:23
		Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times By: David Fanning on Fri, 02 September 2011 15:09
		Re: ENVI_CONVERT_FILE_MAP_PROJECTION processing times By: Martin Landsfeld on Wed, 07 September 2011 19:07

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