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Re: calling MRT Swath from IDL [message #87650 is a reply to message #87649]

Thu, 20 February 2014 15:11

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

lhashemi@g.harvard.edu writes:

> another question: using some IDL codes from NASA website I've read MOD02KHM (500 m) data as an array of reflectance for each band (no longitude and attitude is assigned).using metadata I generate the long/lat of the bounding box(upper left and lower left, upper right and lower right long and lat). is there a way to convert the array and bounding box to a Geotiff? the problem is the pixel size is not fix.
>
> on the other hand, I've read and convert MOD02KHM to Geotiff by Gdal, but the value needs to convert to reflectance and I don't know how to do it.

I don't understand what you mean. You say the MOD02KHM is an array of
reflectance values. How do they become something else when GDAL puts
them into a different file with a map projection?

And, doesn't GDAL require arrays of latitude and longitude (MOD03 files)
to do the conversion? I can't see how it could possibly work without
these values.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		calling MRT Swath from IDL By: lhashemi on Thu, 20 February 2014 11:20
		Re: calling MRT Swath from IDL By: David Fanning on Thu, 20 February 2014 11:26
		Re: calling MRT Swath from IDL By: lhashemi on Thu, 20 February 2014 14:21
		Re: calling MRT Swath from IDL By: David Fanning on Thu, 20 February 2014 15:11
		Re: calling MRT Swath from IDL By: lhashemi on Thu, 20 February 2014 16:56
		Re: calling MRT Swath from IDL By: David Fanning on Thu, 20 February 2014 20:14
		Re: calling MRT Swath from IDL By: devin.white on Sun, 23 February 2014 19:07

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