On Tue, 2010-09-14 at 00:54 +0100, Jon Burgess wrote: > > The coordinates are -2.2227, 49.709 degrees corresponding to > > about -247437,6395975 in the spherical Mercator projection. > I > > extracted the polygon in shoreline_300 and found the > > southernmost point. Its coordinates were -247169,6394645. > > > > > > I think the answer is no, the SR-ORG:6 does not match the OSM > spherical > mercator projection. The (-2.2227, 49.709) is not at the southern tip > of > the island:
Looking again at the http://spatialreference.org/ref/sr-org/6/ site, it looks like this is the correct projection, the input/output co-ordinates match exactly to the ones computed by cs2cs. It looks like the issue is that the co-ordinates being displayed do not align well with the red marker on the SR.org map. Alternatively the map data they are using puts the island at a different position to OSM. Jon _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
