SRM_EC_Parameters

SRM Reference Manual Types SRM_EC_Parameters_2D

/*
 * STRUCT: SRM_EC_Parameters_2D
 *
 *   This data type specifies the parameters needed to define the
 *   Equidistant Cylindrical (EC) 2D Spatial Reference Frame (SRF).
 *   See the Spatial Reference Model for details.
 */

typedef	struct
{
	/*
	* Specification of Object Reference Model (ORM)
	*/
	SRM_Horizontal_Datum_Code	horizontal_datum;
	/*
	* Specification of Projection Basis (standard parallel)
	*/
	SRM_Long_Float	geodetic_latitude;	(notes)
	/*
	* Origin of Spatial Reference Frame
	*/
	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_EC_Parameters_2D;

Field Notes

geodetic_latitude

 in degrees; standard parallel and origin of the projected X
 axis (which is positive northwards)

geodetic_longitude

 in degrees; specifying the meridian of the Y axis;
 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