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/***************************************************************************/
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/* RSC IDENTIFIER: GEOCENTRIC
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* This component provides conversions between Geodetic coordinates (latitude,
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* longitude in radians and height in meters) and Geocentric coordinates
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* (X, Y, Z) in meters.
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* This component checks parameters for valid values. If an invalid value
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* is found, the error code is combined with the current error code using
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* the bitwise or. This combining allows multiple error codes to be
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* returned. The possible error codes are:
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* GEOCENT_NO_ERROR : No errors occurred in function
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* GEOCENT_LAT_ERROR : Latitude out of valid range
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* GEOCENT_LON_ERROR : Longitude out of valid range
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* (-180 to 360 degrees)
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* GEOCENT_A_ERROR : Semi-major axis less than or equal to zero
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* GEOCENT_B_ERROR : Semi-minor axis less than or equal to zero
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* GEOCENT_A_LESS_B_ERROR : Semi-major axis less than semi-minor axis
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* GEOCENTRIC is intended for reuse by any application that performs
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* coordinate conversions between geodetic coordinates and geocentric
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* An Improved Algorithm for Geocentric to Geodetic Coordinate Conversion,
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* Ralph Toms, February 1996 UCRL-JC-123138.
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* Further information on GEOCENTRIC can be found in the Reuse Manual.
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* GEOCENTRIC originated from : U.S. Army Topographic Engineering Center
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* Geospatial Information Division
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* Alexandria, VA 22310-3864
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* None apply to this component.
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* GEOCENTRIC has no restrictions.
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* GEOCENTRIC was tested and certified in the following environments:
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* 1. Solaris 2.5 with GCC version 2.8.1
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* 2. Windows 95 with MS Visual C++ version 6
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/***************************************************************************/
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#define GEOCENT_NO_ERROR 0x0000
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#define GEOCENT_LAT_ERROR 0x0001
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#define GEOCENT_LON_ERROR 0x0002
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#define GEOCENT_A_ERROR 0x0004
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#define GEOCENT_B_ERROR 0x0008
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#define GEOCENT_A_LESS_B_ERROR 0x0010
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/***************************************************************************/
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/* ensure proper linkage to c++ programs */
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long Set_Geocentric_Parameters (double a,
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* The function Set_Geocentric_Parameters receives the ellipsoid parameters
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* as inputs and sets the corresponding state variables.
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* a : Semi-major axis, in meters. (input)
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* b : Semi-minor axis, in meters. (input)
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void Get_Geocentric_Parameters (double *a,
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* The function Get_Geocentric_Parameters returns the ellipsoid parameters
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* to be used in geocentric coordinate conversions.
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* a : Semi-major axis, in meters. (output)
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* b : Semi-minor axis, in meters. (output)
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long Convert_Geodetic_To_Geocentric (double Latitude,
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* The function Convert_Geodetic_To_Geocentric converts geodetic coordinates
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* (latitude, longitude, and height) to geocentric coordinates (X, Y, Z),
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* according to the current ellipsoid parameters.
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* Latitude : Geodetic latitude in radians (input)
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* Longitude : Geodetic longitude in radians (input)
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* Height : Geodetic height, in meters (input)
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* X : Calculated Geocentric X coordinate, in meters. (output)
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* Y : Calculated Geocentric Y coordinate, in meters. (output)
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* Z : Calculated Geocentric Z coordinate, in meters. (output)
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void Convert_Geocentric_To_Geodetic (double X,
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* The function Convert_Geocentric_To_Geodetic converts geocentric
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* coordinates (X, Y, Z) to geodetic coordinates (latitude, longitude,
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* and height), according to the current ellipsoid parameters.
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* X : Geocentric X coordinate, in meters. (input)
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* Y : Geocentric Y coordinate, in meters. (input)
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* Z : Geocentric Z coordinate, in meters. (input)
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* Latitude : Calculated latitude value in radians. (output)
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* Longitude : Calculated longitude value in radians. (output)
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* Height : Calculated height value, in meters. (output)
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#endif /* GEOCENT_H */
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src/geocent.h
