1

I'm trying to find a source of information with the default units (meters, ft, ftUS) associated with an EPSG code. I'm currently using spatialreference.org and fetching URLs like this:

http://spatialreference.org/ref/epsg/2284/proj4/

And then looking at the to_meter field to see if it's ft ftUs or m.

The problem is that the site seems to be incomplete for example they don't have EPSG:6505

http://spatialreference.org/ref/epsg/6505/proj4/

3

The official resource for EPSG codes is http://www.epsg.org/. You can either download the whole dataset or use the online registry http://www.epsg-registry.org/ that is unfortunately not very user friendly. All other sites are still only more or less accurate copies

The definition of EPSG:6505 captured from http://www.epsg-registry.org/export.htm?wkt=urn:ogc:def:crs:EPSG::6505

PROJCRS["NAD83(2011) / Minnesota South (ftUS)",
  BASEGEODCRS["NAD83(2011)",
    DATUM["NAD83 (National Spatial Reference System 2011)",
      ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1.0]]]],
  CONVERSION["SPCS83 Minnesota South zone (US Survey feet)",
    METHOD["Lambert Conic Conformal (2SP)",ID["EPSG",9802]],
    PARAMETER["Latitude of false origin",43,ANGLEUNIT["degree",0.01745329252]],
    PARAMETER["Longitude of false origin",-94,ANGLEUNIT["degree",0.01745329252]],
    PARAMETER["Latitude of 1st standard parallel",45.216666666667,ANGLEUNIT["degree",0.01745329252]],
    PARAMETER["Latitude of 2nd standard parallel",43.783333333333,ANGLEUNIT["degree",0.01745329252]],
    PARAMETER["Easting at false origin",2624666.6667,LENGTHUNIT["US survey foot",0.304800609601]],
    PARAMETER["Northing at false origin",328083.3333,LENGTHUNIT["US survey foot",0.304800609601]]],
  CS[cartesian,2],
    AXIS["easting (X)",east,ORDER[1]],
    AXIS["northing (Y)",north,ORDER[2]],
    LENGTHUNIT["US survey foot",0.304800609601],
  ID["EPSG",6505]]
  • Unfortunately, the WKT is not (yet) the format that GDAL based softeware understands. But the devs are working on it. – AndreJ Oct 23 '18 at 6:19
2

Two sources other than SpatialReference.org to find this information:

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