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Re: Anyone can explain this? [message #64262 is a reply to message #64197]

Wed, 10 December 2008 09:40

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

xiao writes:

> Sorry, David, But i have another question, I suddenly realized that my
> map did not show the continent line. The continent line was erased by
> the contour . But if I put the map_grid and map_continents after the
> contour, it showed me the error :
> -Current ploting device must have mapping coordinates..
> I think i have used the overplot and noerase key word in contour
> command. But it still does not shown.....

I think the (unneeded) NOERASE keyword in the CONTOUR command
is causing a different set of data coordinates to be established
by the CONTOUR command. You want the data coordinates to be set
by the MAP_SET command. You can either re-issue the MAP_SET command
after you issue the CONTOUR command (to re-establish) the map data
coordinates, or you can take the NOERASE off the CONTOUR command.
I would try the latter first.

Is the data you are trying to contour in latitude and longitude units?

Cheers,

David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Anyone can explain this? By: xiao zhang on Sun, 07 December 2008 12:40
		Re: Anyone can explain this? By: David Fanning on Wed, 10 December 2008 10:11
		Re: Anyone can explain this? By: xiao zhang on Wed, 10 December 2008 09:56
		Re: Anyone can explain this? By: David Fanning on Wed, 10 December 2008 09:40

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