On Tue, Apr 10, 2012 at 8:43 AM, Daniel Weitzenfeld <[email protected]> wrote: > I've got shapefiles from the state of Texas describing their new political > districts. It's the first shapefile I've seen where the coordinates don't > seem to be in lon/lat; rather, they look like this: > [1413007.7300121039, 1159556.348466374], [1413007.6640587151, > 1159558.0074478425], [1413007.5669405311, 1159560.4406569004].... > > Anyone know of the top of their head what the units are here, and how I map > them to lon/lat? > > Below is the accompanying DBF. Thanks in advance!
Daniel, I presume this is actually the .prj file. > PROJCS["NAD_1983_Lambert_Conformal_Conic",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1000000.0],PARAMETER["False_Northing",1000000.0],PARAMETER["Central_Meridian",-100.0],PARAMETER["Standard_Parallel_1",34.91666666666666],PARAMETER["Standard_Parallel_2",27.41666666666667],PARAMETER["Latitude_Of_Origin",31.16666666666667],UNIT["Meter",1.0]] > If you have ogr2ogr installed you would do: ogr2ogr output.shp -t_srs WGS84 your.shp The ogr2ogr command is part of GDAL/OGR: http://www.gdal.org/ It is popular among format wankers... Note that you also need to have PROJ.4 installed for use by ogr2ogr. It is the underlying projection engine. http://proj.osgeo.org/ Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [email protected] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
