Hi, I am trying to overlay to raster but I always got this warning message:> test<-overlay(raster1,raster2,fun=function(x,y){x*y})Warning message: In x * y : longer object length is not a multiple of shorter object length Here are the general information about my raster layer raster1 class : RasterLayer dimensions : 421, 465, 195765 (nrow, ncol, ncell) resolution : 0.0002727273, 0.0002727273 (x, y) extent : -71.23787, -71.11105, 8.530567, 8.645386 (xmin, xmax, ymin, ymax) coord. ref. : NA values : C:\Users\Khaeg\Desktop\5Zonen1206020\rr3.asc layer name : rr3 min value : -2147483648 max value : 2147483647 raster2 class : RasterLayer dimensions : 341, 391, 133331 (nrow, ncol, ncell) resolution : 0.000272, 0.000272 (x, y) extent : -71.22967, -71.12332, 8.542734, 8.635486 (xmin, xmax, ymin, ymax) coord. ref. : NA values : C:\Users\Khaeg\Desktop\5Zonen1206020\class_agg.asc layer name : class_agg min value : -2147483648 max value : 2147483647 I do not have much experience in using R that?s why I would really appreciate your help. Thank you! -- View this message in context: http://r.789695.n4.nabble.com/problems-with-overlay-of-raster-tp4634208.html Sent from the R help mailing list archive at Nabble.com.