SRM_AEC_Parameters

SRM Reference Manual Types SRM_AEC_Parameters_3D

/*
 * STRUCT: SRM_AEC_Parameters_3D
 *
 *   This data type specifies the parameters needed to define the
 *   Augmented Equidistant Cylindrical (AEC) 3D 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;
	SRM_Vertical_Datum_Code	vertical_datum;
	/*
	* Specification of Projection Basis (standard parallel)
	*/
	SRM_Long_Float	geodetic_latitude;	(notes)
	SRM_Long_Float	geodetic_longitude;	(notes)
	/*
	* Origin Displacement of Rectangular Coordinates
	*/
	SRM_Long_Float	x_offset;	(notes)
	SRM_Long_Float	y_offset;	(notes)
	SRM_Long_Float	central_scale_factor;	(notes)
	SRM_Elevation_Unit	z_unit;	(notes)

} SRM_AEC_Parameters_3D;

Field Notes

geodetic_latitude

 in degrees; standard parallel and origin of the projected X axis,
 which is positive eastwards

geodetic_longitude

 in degrees; specifying the meridian of the 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

z_unit

 Spatial Reference Frame unit

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Last updated: May 15, 2003