On 17.02.2009 08:35, Hamish wrote: > Hi, > > I am following the v.generalize tutorial at > http://users.ox.ac.uk/~orie1848/tutorial.html > (we should move that to the wiki before it disappears) > but it doesn't say much about working with areas beyond removing small > ones.
That page and the images exists in the svn too. How does one go about adding extra manual pages? Or perhaps we could integrate it into the manual page itself? > > I have a vector area which has a very "steppy" boundary, like from > r.to.vect with a sawtooth pattern at the cell edges. I want to run a > smoothing filter over it to get rid of the jaggy bits. > > No matter what method I try my output map is always the same as the input > map, no vertices are created or destroyed. > > any ideas how to do this? I know about 'v.clean tool=prune' and Markus > Metz's topology-preserving v.simplify (psst- add it to wiki addons) but > I'd like to learn more about how to use v.generalize. How large is the cell you exported from? First you have to use a smoothing operator. When you are done with the smoothing you should use the douglas method to reduce the number of points. I'll see if I can whip up an example for you. --Wolf -- <:3 )---- Wolf Bergenheim ----( 8:> _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
