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. Cheers, giovanni
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