[gdal-dev] can GDAL render two images as if over-plotted?

[Michael Sumner]

Is it possible to "layer" one image over another, the first at full
transparency and the second with partial transparency?

I'm thinking of combining a hillshade and a (partially) transparent
color-relief image, a visual enhancement technique.   (I know how to do
this downstream in R and Python or similar, I'd like to stay in C++'s warm
embrace. )

I can go and find out what "over plot" means when it comes to colour
imagery, just wondering if there's anything in-built already.   This might
be a nice additional mode to gdaldem (and is what I thought "color-relief"
meant,  at first).

Cheers, Mike


-- 
Michael Sumner
Research Software Engineer
Australian Antarctic Division
Hobart, Australia
e-mail: mdsumner at gmail.com
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