I don't know if r.surf.contour is suitable for my data because there are disjointed contour lines and spot elevation data between contour lines. So according to the manual of r.surf.contour:"Violating these constraints will cause non-intuitive anomalies to appear in the output map". Is there any other tool appropriate for my data?Unfortunately there is no time to fix the data.
Hamish wrote: > > > leonidas wrote: >> I need to generate a DEM using a line vector file (contours, >> step=20m, some are disjoined) and also combine a second point >> vector file with heights.How can I achieve that with Grass? > > v.to.rast + r.surf.contour > >> In the contours file there is also the coastline (height=0).Will >> that produce any error? > > yes, please read the r.surf.contour help page carefully about > that. > > > the quick workaround is to use r.mapcalc to multiply your raster > input with: > > r.mapcalc "contline_mult = (contlines*100000)+1" > > then run r.surf.contour > > then reverse the above multiplication: > > r.mapcalc "dem = (contour_dem -1) / 100000" > > > > besides that pain r.surf.contour does a really nice job. > > > Hamish > > > > > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > > -- View this message in context: http://n2.nabble.com/Generate-DEM-with-point-and-line-vector-tp2976281p3037948.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
