Anna is right, but there may be another case if you are interpolating from contours or isolines (such as isochrones as you may be doing) make sure your optimize the number of points on the contour - click on the two last images on the page below to see the difference http://www4.ncsu.edu/~hmitaso/grasswork/interpgen.html
Vasek may have a better example for this - we had to use this approach when interpolating temporal surface from time series of contours. If you see the segments only in some spots that don’t have data (e.g. bare ground lidar where buildings were removed) Anna has written a v.surf.rst wrapper that does two passes interpolation to minimize the visible segments. Perhaps if you could share the data and the command that you have used we can suggest a solution. Helena > On Nov 18, 2015, at 1:35 PM, Anna Petrášová <kratocha...@gmail.com> wrote: > > > > On Wed, Nov 18, 2015 at 1:29 PM, Michael Barton <michael.bar...@asu.edu> > wrote: > Helena (or anyone else), > > I really like the amount of control over interpolation that comes with > v.surf.rst. But it always gives me artifacts at the segment boundaries > (little “cliffs”). Is there some way to prevent that? > > Could you perhaps share the command you use and what type of data (sparse > points or dense lidar) you run it for? From my experience, too low tension or > low npmin can cause that. Default settings are usually not producing the > segments, but it might be time inefficient. > > Anna > > Michael > ____________________ > C. Michael Barton > Director, Center for Social Dynamics & Complexity > Professor of Anthropology, School of Human Evolution & Social Change > Head, Graduate Faculty in Complex Adaptive Systems Science > Arizona State University > > voice: 480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC) > fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC) > www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu > > > > > > > > > > > > > > > > > _______________________________________________ > grass-dev mailing list > grass-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-dev > Helena Mitasova Professor at the Department of Marine, Earth, and Atmospheric Sciences and Center for Geospatial Analytics North Carolina State University Raleigh, NC 27695-8208 hmit...@ncsu.edu http://geospatial.ncsu.edu/osgeorel/publications.html "All electronic mail messages in connection with State business which are sent to or received by this account are subject to the NC Public Records Law and may be disclosed to third parties.” _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
