I have a program that creates a Png file using Rgooglemap with an extent
(lonmin,lonmax,latmin,latmax)
I also have a contour plot of the same location, same extent, same sized
(height/width) png file.
I'm looking for a way to make the contour semi transparent and overlay it on
the google map ( hybrid map)
Since I have 7000 of these to do an automated process is desired ( grin)
Any pointers in the right direction ?
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