On Mon, May 6, 2013 at 4:59 PM, Adrian Kirilov <[email protected]> wrote: > Hello to the GRASS users, > > I have a question about interpolating surface from vector points. I'm > building surface for a large area 8x10km with IDW method, from point data > derived from LiDAR.
IDW is not the best method for many cases. Please take a look here: http://grasswiki.osgeo.org/wiki/Interpolation (yes, that page could be still improved) > There is large area at the south-east side in the dataset (probably > 1/3 of the whole set) with no data and also some small gaps in the data (in > place of buildings). What to do when interpolating because the program > interpolates also in the large 'no data' area resulting in flat surfaces and > strange shapes there? How to proceed in this case? You may try v.surf.bspline instead which uses B-splines rather than IDW. Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
