Lost projection in processing SPOT4 in FLAASH

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Last Post 09 Sep 2010 09:00 PM by anon

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anon

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09 Sep 2010 09:00 PM
Hi all, I have SPOT 4 image in CAP format and "Pseudo Geographic Lat/Lon" projection, after atmospheric correction in FLAASH, it lost the projection, though I tried to registed it with the original SPOT4 image, the warp image still does not have projection. I wonder to know whether it affects the result if I convert the projection to a commonly used one before processing. Or anyone could give a better solution? Thanks! Rong

MariM

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Posts:2396
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10 Sep 2010 06:33 AM
Pseudo Geographic is not a real projection. It is an estimate from the image 4 corners. FLAASH doesn't pass this information on. You might use the SPOT Georeference tool first, and then run the data through FLAASH.

Deleted User

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14 Sep 2010 07:34 AM
Thanks so much! It is working now, but for the location of scene center required in FLAASH, should I use the information from the header file or real center of georeferenced image? There is a little difference between them. Rong

MariM

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Posts:2396
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14 Sep 2010 07:36 AM
Either will work. It doesn't have to be very accurate. FLAASH just needs to know the approximate location.

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