Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5

• To: "thredds@xxxxxxxxxxxxxxxx" <thredds@xxxxxxxxxxxxxxxx>
• Subject: Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
• From: Jon Blower <j.d.blower@xxxxxxxxxxxxx>
• Date: Thu, 31 Mar 2011 15:04:42 +0000

Hi Ivan, all,

Apparently the WKT that should be added to the epsg.properties file in THREDDS 
to suppor the EPSG:3857 projection is as follows.  If someone can confirm that 
this works, this would be very helpful!

PROJCS["WGS 84 / Pseudo-Mercator",
   GEOGCS["WGS 84",
     DATUM["World Geodetic System 1984",
       SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]],
       AUTHORITY["EPSG","6326"]],
     PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
     UNIT["degree", 0.017453292519943295],
     AXIS["Geodetic latitude", NORTH],
     AXIS["Geodetic longitude", EAST],
     AUTHORITY["EPSG","4326"]],
   PROJECTION["Popular Visualisation Pseudo Mercator", 
AUTHORITY["EPSG","1024"]],
   PARAMETER["Latitude of natural origin", 0.0],
   PARAMETER["Longitude of natural origin", 0.0],
   PARAMETER["False easting", 0.0],
   PARAMETER["False northing", 0.0],
   UNIT["metre", 1.0],
   AXIS["Easting", EAST],
   AXIS["Northing", NORTH],
   AUTHORITY["EPSG","3857"]]

(Thanks to Martin Desruisseaux of the Geotoolkit team for this.)

Jon

• Follow-Ups:
  • Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
    • From: Ivan PRICE
  • Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
    • From: Jay Alder