SPCS

 Projection     : State Plane Coordinate System
 Characteristics: rectangular coordinates

 Earth model:
 Only two earth models are supported for State Plane coordinates:

• E0, Clarke 1866 (NAD 1927)
• E8, GRS 1980 (NAD 1983)

These may be defined in the MAPUNITS parameter or the ELLIPS parameter. If undefined, the default earth model is E0 (Clarke 1866, NAD 1927). Any other earth models will be treated as an error.

Defining the MAPUNITS:

State Plane Coordinate System coordinates require a zone number to be defined. This would be defined in the MAPUNITS parameter and would be in the range of 0101 (or 101 for Alabama, East in the following examples) to 5400 (Guam). The units of the coordinates are taken from the State Plane code used: SPCS for meters; SPAF for U.S. Survey Feet; SPIF for International Feet. See the SPCS ZONES section for a list of the State Plane Zones and their suggested units.

 MapUnits "spcs 101"     ! Standard name
 MapUnits "spcs 101 e0"  ! Standard name and ellipsoid

Other parameters:

EASI>nad1927 = "nad1927_text_file"
EASI>nad1983 = "nad1983_text_file"

Possible errors:

 E331, "Invalid earth model defined for the projection" - In setting 
        up for the projection, the earth model is not E0 (Clarke 
        1866, NAD 1927) or E8 (GRS 1980, NAD 1983).
 E100, "Invalid data" - In setting up for the projection, an invalid 
        State Plane zone was entered.
 E328, "No zone was defined or could be derived for the projection" -
        In setting up for the projection, the State Plane zone
        was not specified in MAPUNITS.