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Re: map_proj_inverse question [message #74383]

Wed, 12 January 2011 11:10

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

nata writes:

> Thank you David, I can get the lat/lon values of the mouse position
> doing:
>
> result=CONVERT_COORD(event.X,event.Y,/DEVICE,/TO_DATA)
>
> The problem I have is that my map coordinate system is not set up. So
> when I call CONVERT_COORD I obtain the following message :
> % CONVERT_COORD: Window is closed and unavailable.

Yes, this is one reason I created the MapCoord object
in the Catalyst Library. I was doing a lot of map
projections in widget programs and I needed to be able
to make sure the map data coordinate system was "alive"
when I needed it. Simply calling the Draw method on the
MapCoord object restores the data coordinate system without
actually drawing anything.

WSet, info.mapWindow
info.mapCoord -> Draw

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: map_proj_inverse question By: David Fanning on Wed, 12 January 2011 11:10
		Re: map_proj_inverse question By: natha on Wed, 12 January 2011 11:00
		Re: map_proj_inverse question By: natha on Wed, 12 January 2011 10:53
		Re: map_proj_inverse question By: David Fanning on Wed, 12 January 2011 10:15

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