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Re: Overlaying gridded winds on satellite data [message #44808 is a reply to message #44806]

Wed, 20 July 2005 09:33

Chris[3]
Messages: 7
Registered: July 2005

Junior Member

Hey David,

Thanks for your help...when I run the cursor command...I run it right
after the imagemap procedure...then after that I run it after the
windbarb procedure...and when I do that...the result is differing
latitudes and longitudes of only about .05 degrees. When I use the
cursor command...this is how I write it.

cursor, long, lat
print, lat, long

I see you mention something about DOWN and DATA keywords...what exactly
do they do? Thank you again for all of your support.

Chris

David Fanning wrote:
> Chris writes:
>
>> I forgot to mention how I came up with my conclusion that the latitudes
>> and longitudes do not match up. I used the cursor procedure which I
>> then print to the screen to tell me the latitude and longitude of
>> certain pixels...I use the corner to make sure I click on the same
>> pixel...and the latitudes and longitudes do not match up. Thanks again
>> for all of your help.
>
> Humm. Well, I don't see any reason this doesn't work
> perfectly. :-)
>
> Liam is setting up the map projection for you (Mercator
> in this case), and the wind barbs are certainly going onto
> the map in data coordinate space. Makes me think you
> are not doing the CURSOR command properly. Are you using
> the DOWN and DATA keywords with it? And are you using
> it immediately after you run this program?
>
> Just don't have many other ideas.
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: Overlaying gridded winds on satellite data By: David Fanning on Wed, 20 July 2005 10:39
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 10:03
		Re: Overlaying gridded winds on satellite data By: David Fanning on Wed, 20 July 2005 09:53
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 09:33
		Re: Overlaying gridded winds on satellite data By: David Fanning on Wed, 20 July 2005 09:14
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 08:47
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 08:45
		Re: Overlaying gridded winds on satellite data By: David Fanning on Wed, 20 July 2005 06:08
		Re: Overlaying gridded winds on satellite data By: James Kuyper on Wed, 20 July 2005 05:44
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 13:31

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