Hi Mathieu Thats exactly what I mean, It would be nice functionality in Descartes and very useful in many ways. For example to see the height of trees in forest areas from point cloud, building heights etc. The information above stm ground model is the most interresting for many things, to show height from zero is interresting for ground (terrain) but useless for information above ground (terrain). The workaround you suggested is not possible with thousends of buildings or Point cloud information. So this Thread changes to an hopefully future CR request for Descartes !! Thanks Tom
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