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Hi, I just imported two raster maps into R using the SPGRASS6 package, one containing elevation data and the other containing an erosion index: Kar_inc <-readRAST6("Incis_Kar", plugin=FALSE) Kar_dem <- readRAST6("DEM_Kar", plugin=FALSE) I just wanted to make a xy plot of erosion parameter vs elevation. How does this work? I don't get how to handle SpatialGridDataFrames... Thanks a lot Maarten -- View this message in context: http://www.nabble.com/GRASS-raster-data-processing-tp23981740p23981740.html Sent...