On Fri, Dec 5, 2014 at 6:01 AM, G. Allegri <[email protected]> wrote:
> As far as I can see GRASS doesn't provide any ready-to-go tool to generate > TINs from grid digital elevation models. I know I can transform a grid to a > regular mesh somehow (probably using the Triangle lib for the last step) > but I can't find tools to generate TINs, given a certain amount of > tolerance, which preserve significative locations (like those obtained by > TPI for example) and shapes (in a morphonetric sense). > > Does anybody has experience on this? The general aim is generating terrain > meshes (to be further decimated for LODs) to be employed in a 3D context. > I'm not sure if this would fulfill your requirements but I would use v.delaunay [1]. To get the points, you can use v.random [2, 3] or some more clever method. Vaclav [1] http://grass.osgeo.org/grass70/manuals/v.delaunay.html [2] http://courses.ncsu.edu/mea582/common/GIS_anal_grass/GIS_Anal_grinterp1.html [3] http://grass.osgeo.org/grass70/manuals/v.random.html > Cheers, > giovanni > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user >
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