| Map graphics [message #19876] |
Wed, 03 May 2000 00:00 |
Ben Tupper
Messages: 186
Registered: August 1999
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Senior Member |
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Hello,
I have a widget routine which displays a map (using Map_Set, etc.)
with vector overlays. The routine user can call another widget
application
that displays some direct graphics plots using !P.Multi = [0,2,2].
When the user returns to the main routine, plotting the earlier vector
overlays on the map shows that the plotting parameters have changed.
All of the vectors get squished toward the center of the graphic.
Before starting the second routine, I have saved a copy of !P.Multi,
!X.S, !Y.S, and !Map. Each of these is restored after the second
routine is closed. Short of calling Map_Set again, is there a way I
can save the mapping/plotting parameters and restore them later?
Thanks!
Ben
--
Ben Tupper
Bigelow Laboratory for Ocean Science
tupper@seadas.bigelow.org
pemaquidriver@tidewater.net
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| Re: Map graphics [message #19971 is a reply to message #19876] |
Wed, 03 May 2000 00:00  |
Ben Tupper
Messages: 186
Registered: August 1999
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Senior Member |
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"Liam E.Gumley" wrote:
> Ah the joy of global variables....
>
> One way to handle this problem is to 'refresh' the map projection by
> calling MAP_SET with the /NOERASE and /NOBORDER keywords to re-create
> the map projection whenever you select the graphics window which
> contains the map plot.
>
> If you decide to go the system variable route, I would save !X, !Y, !Z,
> !P, and !MAP for each graphics window. I use this technique in my IDL
> frame tools which allow you to create a map projection in one frame, a
> multiple panel plot in the next frame, and then switch between them with
> no problems:
> http://cimss.ssec.wisc.edu/~gumley/frame.html
>
>
Thanks!
--
Ben Tupper
Bigelow Laboratory for Ocean Science
tupper@seadas.bigelow.org
pemaquidriver@tidewater.net
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| Re: Map graphics [message #19973 is a reply to message #19876] |
Wed, 03 May 2000 00:00 |
Liam E. Gumley
Messages: 378
Registered: January 2000
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Senior Member |
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Ben Tupper wrote:
> I have a widget routine which displays a map (using Map_Set, etc.)
> with vector overlays. The routine user can call another widget
> application
> that displays some direct graphics plots using !P.Multi = [0,2,2].
> When the user returns to the main routine, plotting the earlier vector
> overlays on the map shows that the plotting parameters have changed.
> All of the vectors get squished toward the center of the graphic.
>
> Before starting the second routine, I have saved a copy of !P.Multi,
> !X.S, !Y.S, and !Map. Each of these is restored after the second
> routine is closed. Short of calling Map_Set again, is there a way I
> can save the mapping/plotting parameters and restore them later?
Ah the joy of global variables....
One way to handle this problem is to 'refresh' the map projection by
calling MAP_SET with the /NOERASE and /NOBORDER keywords to re-create
the map projection whenever you select the graphics window which
contains the map plot.
If you decide to go the system variable route, I would save !X, !Y, !Z,
!P, and !MAP for each graphics window. I use this technique in my IDL
frame tools which allow you to create a map projection in one frame, a
multiple panel plot in the next frame, and then switch between them with
no problems:
http://cimss.ssec.wisc.edu/~gumley/frame.html
Cheers,
Liam.
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