SRM_TM_Parameters

SRM Reference Manual Types SRM_TM_Parameters_2D

/*
 * STRUCT: SRM_TM_Parameters_2D
 *
 *   This data type specifies the parameters needed to define the
 *   Transverse Mercator (TM) 2D Spatial Reference Frame (SRF).
 *   See the Spatial Reference Model (SRM) for details.
 */

typedef	struct
{
	/*
	* Specification of Object Reference Model (ORM)
	*/
	SRM_Horizontal_Datum_Code	horizontal_datum;
	/*
	* Specification of Projection Basis
	*/
	SRM_Long_Float	geodetic_latitude;	(notes)
	SRM_Long_Float	geodetic_longitude;	(notes)
	/*
	* Origin Displacement of Coordinate System
	*/
	SRM_Long_Float	x_offset;	(notes)
	SRM_Long_Float	y_offset;	(notes)
	SRM_Long_Float	central_scale_factor;	(notes)

} SRM_TM_Parameters_2D;

Field Notes

geodetic_latitude

 in degrees; used to define origin

geodetic_longitude

 in degrees; specifying the meridian of the positive Y axis
 (which is positive northwards)

x_offset

 origin relative displacement in x

y_offset

 origin relative displacement in y

central_scale_factor

 unitless; normally close to (<=) 1.0

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Last updated: May 15, 2003