old code to convert CA State Plane 3 to WGS84
I had no idea what I was doing at the time. You should probably use GDAL and http://www.spatialreference.org/ref/epsg/2872/ instead.
@migurski says that the correct way to convert is
ogr2ogr -s_srs EPSG:2872 -t_srs EPSG:4326 -f GeoJSON…