: Hi list, I’m a newcomer to GIS and r-sig-geo. I have exported some shapefiles from ArcGIS and succeeded in plotting them with R. But one shapefile has a different coordinate system, I think, and it does not turn up in the graph when added to the others. In ArcGIS, this layer had an ‘unknown’ coordinate system, but rendered at the right location in relation to the other layers. I have made a tar-archive with the shape-files and a script to import them into R and generate a map. The problematic : Michael, you just made my day! Thanks! — Hans Ekbrand (http://sociologi.cjb.net) A. Because it breaks the logical sequence of discussion Q. Why is top posting bad? ————– next part ————– A non-text attachment was scrubbed… Name: not available Type: application/pgp-signature Size: 197 bytes Desc: Digital signature URL: Source.