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

• To: thredds@xxxxxxxxxxxxxxxx
• Subject: Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
• From: Ivan PRICE <ivan.price@xxxxxxxxxxx>
• Date: Thu, 31 Mar 2011 17:45:51 +0200

thanks very much

-ivan




Le 31/03/2011 5:04 PM, Jon Blower a écrit :

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

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• Follow-Ups:
  • [thredds] TDS 4.2.x WMS support for EPSG 3857, 3408, and 3409 CRS [was: Re: EPSG 3857 (google maps / 900913) in TDS 4.2.5]
    • From: Ethan Davis

• References:
  • Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
    • From: Jon Blower