Elevation colour bands in Aven

[Paul Fretwell]

I am trying to plot all the caves over a wide area (entire Matienzo 
expedition area) in Aven, so that I can generate overlays for Googlemaps. 
One thing that is a problem with this is that elevation detail is 
difficult to determine by colour due to the wide elevation range of the 
caves (615m to 40m). What appears to happen is most of the caves are 
pushed into the blue banding. Looking at the colour bar in Aven, it 
appears that the blue zone takes up a lot of the elevation range, as does 
the red zone. In the middle the bands for Orange, yellow, green are fairly 
narrow. Would it be possible to extend the colour banding to include 
purple at the bottom, and lessen the bias of the red and blue bands to 
give better visual differentiation of passages at elevations in the middle 
of the range?

Footleg
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