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Re: how to make lat/long grid for MODIS in IDL [message #86351 is a reply to message #86350]

Wed, 30 October 2013 00:48

dm_gty88
Messages: 8
Registered: October 2013

Junior Member

Just for an example, using the file in http://www.idlcoyote.com/map_tips/warptomap.php, I have only peruimage. I want to generate peru_lat and peru_lon. How would I do that?

On Wednesday, October 30, 2013 1:52:58 PM UTC+8, dm_gty88 wrote:
> Thanks for the link but I'm trying to make an array that would contain the latitude values and another to hold the longitude values. Somewhat like given a MODIS 1200x1200 image and its the coordinates for its corners, I will produce two variables containing 1200x1200 arrays with the lat and long values. Can't seem to get a result like that from the procedure you posted.
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> On Thursday, October 10, 2013 9:35:38 PM UTC+8, David Fanning wrote:
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>> dm_gty88 writes:
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>>> I've been trying to make a 2-dimensional array containing lat and long values for the MOD09A1 (basically georeferencing). I've tried using the map_proj_init and map_proj_inverse functions but the output is way off the bounds of my tile. Does anyone have a way to do this in IDL? Other software/methods would be okay but it'll be great if I could use IDL for this. The only data I could supply is are the corners of the tile and other metadata in the MODIS file, like sphere
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>> radius. Thanks!
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>> You might be interested in this article:
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>> http://www.idlcoyote.com/map_tips/modis_overlay.html
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>> Cheers,
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>> David
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>> --
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>> David Fanning, Ph.D.
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>> Fanning Software Consulting, Inc.
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>> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
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>> Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		how to make lat/long grid for MODIS in IDL By: dm_gty88 on Tue, 08 October 2013 20:45
		Re: how to make lat/long grid for MODIS in IDL By: Fabzi on Wed, 09 October 2013 00:31
		Re: how to make lat/long grid for MODIS in IDL By: David Fanning on Thu, 10 October 2013 06:35
		Re: how to make lat/long grid for MODIS in IDL By: dm_gty88 on Tue, 29 October 2013 22:52
		Re: how to make lat/long grid for MODIS in IDL By: dm_gty88 on Wed, 30 October 2013 00:48
		Re: how to make lat/long grid for MODIS in IDL By: David Fanning on Wed, 30 October 2013 05:53
		Re: how to make lat/long grid for MODIS in IDL By: dm_gty88 on Wed, 13 November 2013 16:30
		Re: how to make lat/long grid for MODIS in IDL By: David Fanning on Wed, 13 November 2013 18:03
		Re: how to make lat/long grid for MODIS in IDL By: dm_gty88 on Thu, 14 November 2013 03:35
		Re: how to make lat/long grid for MODIS in IDL By: David Fanning on Thu, 14 November 2013 05:55

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