Hi, all, I am wondering if it is at all possible to introduce shading of a map's relief, i.e. to put a dark shade over areas that ly in the 'shadow' of a mountain, assuming there is a lightsource illuminates the map from a certain direction and a certain elevation.
One occasionally sees maps that do have this type of shading and I'd like to experiment with it in my maps. I do include elevation countours, but would like to see what the effect would be by adding relief shading. Does one need a DEM of the map area, or is there a way to do the necessary calculations from the positions and elevation values of the contours? TIA. Andre Boessenkool
