| Re: Display and Navigate Image in IDL 8.2 [message #81370 is a reply to message #81350] |
Mon, 10 September 2012 14:44   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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I wrote earlier today:
> I learned today, with some help from the folks at ExcelisVIS,
> how to add a box axis to the image.
>
> The secret is to NOT use the LIMIT and BOX_AXES
> keywords when you create the map projection, since
> this results in a blank window. (I don't know why
> I didn't think of this!)
>
> Rather, you should set the LIMIT and BOX_AXES
> properties on your map projection sometime after
> you display the image and sometime before you
> throw the goddamn computer out the window.
As I was writing this up for my article on the topic
I noticed that setting the LIMIT like this after the
fact will blur the image substantially. I think this
is because the image will be warped into the map
projection space, which is the thing I am trying
desperately to avoid. :-(
You can see this by comparing the Coyote Graphics
version of this plot with the Function Graphics
version in this article:
http://www.idlcoyote.com/ng_tips/mapnogrid.php
Or, you can run the code in this example and compare
the two results:
http://www.idlcoyote.com/tip_examples/mapnogrid.pro
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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