I am working with (geostationary) satellite data, and one of the things
I want to do is plot a map (coastlines) on top of the satellite image.
As an IDL user I know how to do this in IDL (although in IDL it is a bit
of a hassle), but I don't seem to be able to figure out how this could
be done in python.
The satellite data consists of a rectangular field of N by N pixels. The
data is already converted to bitmap RGB values. I have figured out how
this can be written to a bitmap image like PNG or JPG.
I further figured out how to do the satellite projection in Basemap, and
how to plot Basemap coastlines. However, the Basemap appears to have a
non-transparent background, which overplots all bitmap data if I plot
the Bitmap data first. I had hoped that there would be some transparency
setting in Basemap, but alas.
(ps. Keep in mind that I do not want to use some contour filling routine
for plotting the satellite data. I want to retain the original N x N
pixels and image size)
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