Geodetic
// Specification of Object Reference Model (ORM)
SRM_HORIZONTAL_DATUM_ENUM horizontal_datum
SRM_VERTICAL_DATUM_ENUM vertical_datum
// Specification of Projection Basis
// Origin of Coordinate System
// Prime Meridian & Equator
// Coordinate System Units
SRM_DISTANCE_UNITS_ENUM z_units // feet or meters
// Origin Displacement of Coordinate System
SRM_FLOAT64 geodetic_longitude // degrees
SRM_FLOAT64 geodetic_latitude // degrees
SRM_FLOAT64 elevation // Elevation or height; positive
// "outwards" along the direction