Hi Bob, > I have a set of rasters (ground acceleration, modal mag., and > distance) that I want to interpolate based on the location of > my point features (borehole location) and update my point feature > with the values from this interpolation. I see that v.what.rast > might help, but I'm not sure what kind of interpolation it uses > (probably nearest neighbor?). I also see that v.sample can be > used, but it does not work with geographic coordinate system locations. > So, I was hoping that the list might have other ideas in solving my problem.
I think it is best to approach the problem in two steps. First do your interpolations using a method appropriate to your data type, sampling density, sensitivity to outliers, etc. Then once you have your interpolated surface run v.what.rast, or v.rast.stats, or from addons v.rast.stats2 or v.what.rast.buffer depending if you want to pick off the exact interpolated value at a given site, a statistical indicator for values around that site (e.g. variance) as either a buffer distance or within a given vector polygon. By the way, we are currently discussing / upgrading the v.krige offerings, you're most welcome to weigh in on the conversation if that's what you're after. Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
