Proj4 Parameter List

Copied from http://trac.osgeo.org/proj/wiki/GenParms. The contents of this page have been replicated here for future reference, preservation, and to provide search context.

Parameter list

Common parameters:

+a         Semimajor radius of the ellipsoid axis
+alpha     ? Used with Oblique Mercator and possibly a few others
+b         Semiminor radius of the ellipsoid axis
+datum     Datum name (see `proj -ld`)
+ellps     Ellipsoid name (see `proj -le`)
+k         Scaling factor (old name)
+k_0       Scaling factor (new name)
+lat_0     Latitude of origin
+lat_1     Latitude of first standard parallel
+lat_2     Latitude of second standard parallel
+lat_ts    Latitude of true scale
+lon_0     Central meridian
+lonc      ? Longitude used with Oblique Mercator and possibly a few others
+nadgrids  Filename of NTv2 grid file to use for datum transforms
+no_defs   Don't use the /usr/share/proj/proj_def.dat defaults file
+pm        Alternate prime meridian (typically a city name)
+proj      Projection name (see `proj -l`)
+south     Denotes southern hemisphere UTM zone
+to_meter  Multiplier to convert map units to 1.0m
+towgs84   3 or 7 term datum transform parameters
+units     meters, US survey feet, etc.
+x_0       False easting
+y_0       False northing
+zone      UTM zone

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Tags: datum, easting, ellps, northing, parameter, proj4, wkt