Andreas, here some older post from Helena (I have taken out non-relevant comments, and it is now v.surf.rst):
On Thu, Jan 10, 2002 at 11:01:13AM -0500, Helena Mitasova wrote: > substantially reduce the number of > points on contours - they are oversampled (choose dmin at least 1.5 times > resolution and dmax a BIG number so that the program does not add > additional points to contours). If you still get the segments - run > r.random on your new DEM in the area where you have the visible segments > to generate few additional points and add them to your contours and > reinterpolate. And use smoothing at least 0.1 (you can use variable > smoothing with s.surf.rst - set it zero for the peaks and higher value for > the flat areas). ... > It is not too difficult to fix the visible segments problem - the errors > is very small so it is more cosmetics (but a very unpleasant one) - so > those segments just need to be smoothed out withing the program - we used > to have it with older segmentation that we used for the MG93 paper). ... > Helena You also find this addressed in the new GRASS book (3rd edition). Markus -- View this message in context: http://www.nabble.com/Artefacts-when-interpolating-DTM-from-Contour-Lines-with-v.surf.rst-tf4586346.html#a13111277 Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
