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Re: CONTOUR and automatic gridding of irregularly spaced data [message #85024 is a reply to message #85023]

Mon, 24 June 2013 06:21

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Karlo Janos writes:

> IDL 8.2.3 provides automatic gridding of irregularly spaced data with
> the CONTOUR function. Great, I thought in hope to get rid of my CONTOUR
> plots in direct graphics.
>
> But when I use a CONTOUR function plot combined with a 'Mollweide' MAP
> projection and CENTER_LONGITUDE=nonzero_value the automatic gridding
> yields a gap between the -180 and +180 degrees longitudes.
> The gap exists even though I have used GRID_UNITS='degrees' which should
> cause the use of the SPHERE keyword as it is stated in the documentation
> of the CONTOUR function.
>
> The only way to avoid this is manually invoking the gridding routines.
>
> Did I do something wrong?

Let's just say you are not the first to be thrown upon the shoals of
disappointment. ;-)

Cheers,

David

P.S. What's wrong with gridding the data yourself? God knows, if you do,
it is one less thing to go wrong.

--
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]

		CONTOUR and automatic gridding of irregularly spaced data By: Karlo Janos on Mon, 24 June 2013 06:10
		Re: CONTOUR and automatic gridding of irregularly spaced data By: David Fanning on Mon, 24 June 2013 06:21
		Re: CONTOUR and automatic gridding of irregularly spaced data By: Karlo Janos on Tue, 25 June 2013 00:12
		Re: CONTOUR and automatic gridding of irregularly spaced data By: David Fanning on Tue, 25 June 2013 05:03
		Re: CONTOUR and automatic gridding of irregularly spaced data By: Karlo Janos on Tue, 25 June 2013 06:24

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