Albers Equal-Area Conic

Name Albers Equal-Area Conic
EPSG Code 9822
GeoTIFF Code CT_AlbersEqualArea (11)
OGC WKT Name Albers_Conic_Equal_Area
Supported By GeoTIFF, GXF, OGC WKT

Projection Parameters

Name EPSG # GeoTIFF ID OGC WKT Units Notes
Latitude of first standard parallel 1 StdParallel1 standard_parallel_1 Angular
Latitude of second standard parallel 2 StdParallel2 standard_parallel_2 Angular
Latitude of false origin 3 NatOriginLat latitude_of_center Angular
Longitude of false origin 4 NatOriginLong longitude_of_center Angular
Easting of false origin 6 FalseEasting fase_easting Linear
Northing of false origin 7 FalseNorthing fase_northing Linear


This projection is supported by GCTP, and many other packages.

In Geosoft GXF format it is known by the name "*Albers Equal-Area Conic" indicating that it isn't an EPSG projection.

GeoTIFF: I have incorporated a version that corresponds to the GeoSoft, Intergraph and PCI definitions, and mostly like the second option here, but using NatOriginLat, and NatOriginLong rather than FalseOriginLat/FalseOriginLong or NatOriginLat/CenterLong as sometimes is done. This doesn't match the earlier AlbersEqualArea = LinearUnits + StdParallel1 + StdParallel2 + CenterLong + NatOriginLat + FalseEasting + FalseNorthing proposition form the GeoTIFF mailing list.

PROJ.4 Organization

  +proj=aea   +lat_1=Latitude of first standard parallel
              +lat_2=Latitude of second standard parallel
              +lat_0=Latitude of false origin 
              +lon_0=Longitude of false origin
              +x_0=Easting of false origin
              +y_0=Northing of false origin