[R-sig-Geo] Distance from point to specified raster cell value
a_lafontaine at hotmail.com
Mon Jul 6 19:38:44 CEST 2015
I am looking for a way to extract the distance from spatial points objects to the closest raster cell of a specific value. I have not a found a way to do so yet with the raster or rgeos librairies...
Something like the gDistance function in which I could specify the raster value I am interested in:
gDistance( spatialpoints, r[r==15])
If anyone have suggestions, (it needs to be fairly quick because I have thousands of points to compute).
Any help really appreciated,
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