I have a set of lat/long ccordinates for which I wanted to pull corresponding BioClim (1-19) values. I first used ArcMap, without interpolating, and came up with a set of data. I then used R's 'raster' package - both using the 'simple' method and the 'bilinear' interpolating extraction method, and though they were in the ballpark, neither values matched what I got from the ArcMap 'Extract raster values to points' procedure. Has anyone ever had this problem? Here are some of my coordinates: 45.367183 6.028633, 45.39175 6.122389, 45.392611 6.11675, Thanks for any help you can give!