Prevent automatic scalar mapping when plotting RGB images#872
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atedstone wants to merge 3 commits intoGlacioHack:mainfrom
Open
Prevent automatic scalar mapping when plotting RGB images#872atedstone wants to merge 3 commits intoGlacioHack:mainfrom
atedstone wants to merge 3 commits intoGlacioHack:mainfrom
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…d - instead supply cmap=None to disable scalar mapping
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Relates to prep. work for #860 . I found a bug where we are passing a
cmapvalue toplt.imshow()when usingRaster.plot()to plot a multi-band image (e.g. RGB). This results inimshow()triggering some kind of scalar remapping of the supplied data. This is not a desired automatic behaviour as we are then not in control of this remapping. In my tests I found that it brings a danger of introducing a colour contrast in some extreme images (e.g. accumulation zone of the Greenland Ice Sheet).By passing
cmap=Nonewe disable this behaviour.