Hello all, I am currently working with environmental data at a global scale for modeling marine species distribution. These environmental data are provided as ASCII files and I convert them into raster for the analyzes, using the raster package. All of these raster are centered around the Greenwich meridian. However, for visualization purpose, I would like to be able to plot these raster centering them on the Pacific. This is easily done with GIS software, by defining the central meridian at -180° in the coordinate system. However, I can't find a way to do the same in R. I tried to adjust the coordinate reference system as follows: SST.ras <- raster(SST.asc,crs = "+proj=merc +lat_ts=0 +lon_0=-180 +x_0=0 +y_0=0 +ellps=WGS84 +over") But this has no effect on the way the raster is plotted. The answer may be straightforward, but I didn't find any solution in other topics. Can someone enlighten me on this? Thank you, Sophie [[alternative HTML version deleted]]