Hi, The google mercator projection, called EPSG:900913 as <google> in 1337-speech, is now referenced as EPSG 3785 : http://www.epsg-registry.org/report.htm?type=lastQuery&title=&reportDeta il=short&style=urn:uuid:report-style:default-with-code&style_name=OGP%20 Default%20With%20Code&title=3785
You will find definitions in all formats here : http://spatialreference.org/ref/user/popular-visualisation-crs-mercator/ Especially for postgis : http://spatialreference.org/ref/user/popular-visualisation-crs-mercator/ postgis/ Bye, Vincent > > By the way, are the Google Mercator and WGS84 systems equivalent > > No they aren't. I think Google is a mercator meter > projection (not good for measurement though but more or less > good for presentation) and they use WGS84 datum when > accepting data. I think it actually has an official SRID > (could be wrong) that is EPSG:900913 > > and proj4 looks like this > > +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 > +x_0=0.0 +y_0=0 > +k=1.0 +units=m [EMAIL PROTECTED] +no_defs > > People usually plot WGS84 longlat (4326) on Google Maps, thus > the confusion. > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > ----------------------------------------- > The substance of this message, including any attachments, may > be confidential, legally privileged and/or exempt from > disclosure pursuant to Massachusetts law. It is intended > solely for the addressee. If you received this in error, > please contact the sender and delete the material from any computer. > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
