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Re: Unable to get GRIDDATA Function to Work Properly [message #77214]

Wed, 17 August 2011 04:40

Klemen
Messages: 80
Registered: July 2009

Member

>> I haven't done it, but based on the help page I'd guess that you might
>> want to use /SPHERE and /DEGREE.
>
>> -Jeremy.
>
> Those seemed like reasonable suggestions, but unfortunately they did
> nothing for me =(

Ty it again. Use a combination of TRIANGULATE and GRIDDATA - an
example below (with a link to discussion about reprojection). But be
aware - this might be very slow if working with large datasets. If you
don't have many points to interploate it would make sense to select
the area around each point and use only the closest points for
interpolation. You can of course use also some other method instead
of /NEAREST_NEIGHBOR.
Cheers, Klemen

TRIANGULATE, lon, lat, trg, SPHERE=sphere, /DEGREES, FVALUE=testgrid
mygrid = GRIDDATA(lon, lat, m_testgrid, /SPHERE, /DEGREES, /
NEAREST_NEIGHBOR, TRIANGLES = trg, /GRID, XOUT=[-115.0], YOUT=[35.0])

http://groups.google.com/group/comp.lang.idl-pvwave/browse_t hread/thread/688e9587fa29ecb7/2f7820d787d6047f?hl=en&lnk =gst&q=#2f7820d787d6047f

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		Re: Unable to get GRIDDATA Function to Work Properly By: Klemen on Wed, 17 August 2011 04:40
		Re: Unable to get GRIDDATA Function to Work Properly By: Jon on Tue, 16 August 2011 17:29
		Re: Unable to get GRIDDATA Function to Work Properly By: Jeremy Bailin on Tue, 16 August 2011 09:32

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