Parameter Name

Description

ORG_LNG

Longitude, in degrees, of the central meridian of the coordinate system (or map).

PARM1

Latitude, in degrees, of the standard parallel, usually zero indicat­ing the equator. Using a non-zero value has an affect similar to that of the MAP_SCL reduction factor of other cylindrical projec­tions.

MAP_SCL

Used only when defining a coordinate system that is to produce measurements on a scaled paper map. This value is the scale of the map, e.g., 100,000. Normally, this value is set to 1.0.

X_OFF

The false easting to be applied to all X coordinates, usually se­lected to cause all X coordinates within the coordinate system to be positive values of reasonable size.

Y_OFF

The false northing to be applied to all Y coordinates.