Visualising Surface Contours in Aven

Olly Betts olly at
Thu Oct 5 17:11:10 BST 2006

On Thu, Oct 05, 2006 at 02:52:36PM +0100, Paul Footleg Fretwell wrote:
> I've been experimenting with plotting the surface contours over a cave 
> survey and have found the results difficult to visualise in Aven.
> Marking the surface using the surface flag colours all the contours white, 
> but the cave survey colouring is now based on the total elevation range of 
> the data in the 3d file including the surface. So in effect all my cave 
> appears blue, where as without the surface contours the cave was coloured 
> from blue through to red based on the elevation range just within the 
> survey.

So it is.  That's a bug - the colour range should just depend on the
cave passage.  I guess I've just never noticed because I don't have
surface survey that much higher than the cave entrances.

> Are there any options I can try which might help?

It should be easy to fix the bug - if you're using Linux I can send a
source patch.  If you're on Windows, you'll need to wait until I can
sort out the next release, which will probably be a week or two.

I'm going to add explicit support for terrain data soon too, which will
probably look better still.


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