It is from points not lines. I just got out of class. But I’ll get the data together and send it on in a bit. Thanks much.
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 > On Nov 18, 2015, at 1:12 PM, Helena Mitasova <hmit...@ncsu.edu> wrote: > > 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
