Reassigning coordinates?
On Tue, 2 Nov 2010, Brian Oney wrote:
Hello List, I need to reassign coordinates of a few points to have coordinates of the nearest raster cell. I KNOW that this is BAD practice but for the time being I assume that it does not affect my analysis (species distribution analysis). I think the datum of the point data is different than that of my raster data, but for now it is not important. I have already perused the "sp" and "raster" packages extensively. I guess I just need to be pointed in the right (WRONG) direction. I had a few thoughts with the distance function but I am now stuck. Maybe use "distance" then "which.min" then take the coordinates?
Maybe try nn2() in the RANN package with k=1 to find the nearest neighbour for each query point, with - I think - grid as data and points to move as query? Roger
Best Regards, Brian
_______________________________________________ R-sig-Geo mailing list R-sig-Geo at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no