2

I am using QGIS to calculate the terrain slope, starting from vector contour line data. Using linear interpolation like r.surf.contour gives me a reasonable looking DEM, but is not really useful if I need realistic slope data. I have seen a lot about Kriging point data, but it is not something I have tried before and also I have a large number of points – more than you would normally use for Kriging. Should I Krige the point data or is there a simpler way of getting a smooth slope?

1. The DEM from contour data 1. The DEM linearly interpolated from contour data

2. Slope of the DEM 2. Slope of the DEM — the linear interpolation is clearly visible

3. Nodes from contour data 3. Nodes from contour vectors — too many for Kriging?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.