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Re: How to grid pixel level data where latitude and longitude are 2D arrays [message #84955 is a reply to message #84954]

Wed, 19 June 2013 13:41

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> That is an awful lot of data points. I can see why there is some
> thrashing going on. Can you get this to work if you take some reasonably
> small number of random points from your data and worked with those?
> Maybe you are so oversampled, it won't make any difference. :-)

What if you used HIST_ND to bin up your lat/lon arrays, then looped
through each bin and used the reverse indices vector to select the data
values you want to use in each bin. Take the median value of the data
values as the value for the bin. That would take seconds, rather than
days.

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]

		How to grid pixel level data where latitude and longitude are 2D arrays By: masterjedirobyn on Wed, 19 June 2013 12:31
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: David Fanning on Wed, 19 June 2013 13:30
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: David Fanning on Wed, 19 June 2013 13:41
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: masterjedirobyn on Wed, 19 June 2013 13:58
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: David Fanning on Wed, 19 June 2013 14:17
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: dplatten on Thu, 20 June 2013 04:00
		Re: How to grid pixel level data where latitude and longitude are 2D arrays By: David Fanning on Thu, 20 June 2013 05:35

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