I found this link from the GRASS wiki to be quite helpful. http://skagit.meas.ncsu.edu/~helena/grasswork/interpgen.html
Mark On Thu, Feb 26, 2009 at 9:52 AM, Christian Braun <[email protected]>wrote: > Dear list members, > > I am currently working on the generation of a hydrologic correct DEM. > As base data I have isolines on a 20k scale and 60000 fix height points for > whole Luxembourg (approx. 2500km^2) > I tried first v.surf.rst with the isoline input and it generates in the > region of valleys and plateaus artificial artifacts where it isn't able to > gather enough data in range of the isolines. It is clearly visible that > these represent the segmentation windows of the algorythm. > Because of the processing time (>20h for a small area) I shifted to > v.to.points in combination with v.surf.rst and try to include also the fix > height points for the interpolation. > Can you tell me some suitable parameters to start with for v.surf.rst in > context of using isolines as input. In areas with higher slope I have plenty > of representation but I don't have data in flat areas like valleys and > plateaus. > > Thanks in advance and greetings from Luxembourg, > Christian > > ------------------------------------------------------------ > Dipl. Geogr. Christian Braun > Tel: +352- 425991-608 > Mobil: +49-179-6845896 > Mail: [email protected] > > Resource Centre for Environmental Technologies, > Public Research Centre Henri Tudor, > Technoport Schlassgoart, > 66 rue de Luxembourg, > P.O. BOX 144, > L-4002 Esch-sur-Alzette, Luxembourg > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user >
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