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Re: get lat/lon from image with MAP_SET [message #81292]

Fri, 31 August 2012 08:27

DavidF[1]
Messages: 94
Registered: April 2012

Member

Skymaxwell writes:

> I have image with map_set in widget_draw. Here is sample code
>
> MAP_SET,/STEREO,-90.,0.,/ISOTROPIC,/HORIZON,E_HORIZON={FILL: 0}
> r=map_image(data,startx,starty,LATMIN=-90,LATMAX=0,$
> LONMIN=-180,LONMAX=180,COMPRESS=1)
> TVSCL,r,startx,starty
>
> I want get lat/lon values from pixel under cursor. How i can do that ?

Restore your map data coordinate system (probably from saved !X,!Y, and !P
system variables (unless you want to use Coyote Map routines), then use
Convert_Coord to convert your event.x and event.y device coordinates to
data coordinates.

Cheers,

David

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