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/***************************************************************************/
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/* RSC IDENTIFIER: ALBERS
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* This component provides conversions between Geodetic coordinates
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* (latitude and longitude in radians) and Albers Equal Area Conic
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* projection coordinates (easting and northing in meters) defined
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* by two standard parallels.
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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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* ALBERS_NO_ERROR : No errors occurred in function
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* ALBERS_LAT_ERROR : Latitude outside of valid range
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* ALBERS_LON_ERROR : Longitude outside of valid range
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* (-180 to 360 degrees)
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* ALBERS_EASTING_ERROR : Easting outside of valid range
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* (depends on ellipsoid and projection
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* ALBERS_NORTHING_ERROR : Northing outside of valid range
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* (depends on ellipsoid and projection
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* ALBERS_FIRST_STDP_ERROR : First standard parallel outside of valid
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* range (-90 to 90 degrees)
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* ALBERS_SECOND_STDP_ERROR : Second standard parallel outside of valid
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* range (-90 to 90 degrees)
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* ALBERS_ORIGIN_LAT_ERROR : Origin latitude outside of valid range
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* ALBERS_CENT_MER_ERROR : Central meridian outside of valid range
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* (-180 to 360 degrees)
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* ALBERS_A_ERROR : Semi-major axis less than or equal to zero
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* ALBERS_INV_F_ERROR : Inverse flattening outside of valid range
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* ALBERS_HEMISPHERE_ERROR : Standard parallels cannot be opposite
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* ALBERS_FIRST_SECOND_ERROR : The 1st & 2nd standard parallels cannot
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* ALBERS is intended for reuse by any application that performs an Albers
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* Equal Area Conic projection or its inverse.
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* Further information on ALBERS can be found in the Reuse Manual.
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* ALBERS 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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* ALBERS has no restrictions.
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* ALBERS 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. MSDOS with MS Visual C++, version 6
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* 07-09-99 Original Code
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/***************************************************************************/
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#define ALBERS_NO_ERROR 0x0000
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#define ALBERS_LAT_ERROR 0x0001
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#define ALBERS_LON_ERROR 0x0002
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#define ALBERS_EASTING_ERROR 0x0004
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#define ALBERS_NORTHING_ERROR 0x0008
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#define ALBERS_ORIGIN_LAT_ERROR 0x0010
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#define ALBERS_CENT_MER_ERROR 0x0020
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#define ALBERS_A_ERROR 0x0040
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#define ALBERS_INV_F_ERROR 0x0080
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#define ALBERS_FIRST_STDP_ERROR 0x0100
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#define ALBERS_SECOND_STDP_ERROR 0x0200
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#define ALBERS_FIRST_SECOND_ERROR 0x0400
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#define ALBERS_HEMISPHERE_ERROR 0x0800
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/***************************************************************************/
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* FUNCTION PROTOTYPES
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/* ensure proper linkage to c++ programs */
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long Set_Albers_Parameters(double a,
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double Origin_Latitude,
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double Central_Meridian,
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double Std_Parallel_1,
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double Std_Parallel_2,
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double False_Easting,
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double False_Northing);
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/* The function Set_Albers_Parameters receives the ellipsoid parameters and
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* projection parameters as inputs, and sets the corresponding state
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* variables. If any errors occur, the error code(s) are returned by the function,
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* otherwise ALBERS_NO_ERROR is returned.
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* a : Semi-major axis of ellipsoid, in meters (input)
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* f : Flattening of ellipsoid (input)
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* Origin_Latitude : Latitude in radians at which the (input)
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* point scale factor is 1.0
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* Central_Meridian : Longitude in radians at the center of (input)
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* the projection (central meridian)
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* Std_Parallel_1 : First standard parallel (input)
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* Std_Parallel_2 : Second standard parallel (input)
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* False_Easting : A coordinate value in meters assigned to the
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* central meridian of the projection. (input)
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* False_Northing : A coordinate value in meters assigned to the
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* origin latitude of the projection (input)
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void Get_Albers_Parameters(double *a,
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double *Origin_Latitude,
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double *Central_Meridian,
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double *Std_Parallel_1,
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double *Std_Parallel_2,
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double *False_Easting,
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double *False_Northing);
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/* The function Get_Albers_Parameters returns the current ellipsoid
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* parameters, and Albers projection parameters.
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* a : Semi-major axis of ellipsoid, in meters (output)
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* f : Flattening of ellipsoid (output)
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* Origin_Latitude : Latitude in radians at which the (output)
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* point scale factor is 1.0
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* Central_Meridian : Longitude in radians at the center of (output)
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* Std_Parallel_1 : First standard parallel (output)
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* Std_Parallel_2 : Second standard parallel (output)
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* False_Easting : A coordinate value in meters assigned to the
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* central meridian of the projection. (output)
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* False_Northing : A coordinate value in meters assigned to the
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* origin latitude of the projection (output)
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long Convert_Geodetic_To_Albers (double Latitude,
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/* The function Convert_Geodetic_To_Albers converts geodetic (latitude and
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* longitude) coordinates to Albers projection (easting and northing)
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* coordinates, according to the current ellipsoid and Albers projection
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* parameters. If any errors occur, the error code(s) are returned by the
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* function, otherwise ALBERS_NO_ERROR is returned.
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* Latitude : Latitude (phi) in radians (input)
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* Longitude : Longitude (lambda) in radians (input)
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* Easting : Easting (X) in meters (output)
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* Northing : Northing (Y) in meters (output)
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long Convert_Albers_To_Geodetic(double Easting,
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/* The function Convert_Albers_To_Geodetic converts Albers projection
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* (easting and northing) coordinates to geodetic (latitude and longitude)
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* coordinates, according to the current ellipsoid and Albers projection
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* coordinates. If any errors occur, the error code(s) are returned by the
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* function, otherwise ALBERS_NO_ERROR is returned.
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* Easting : Easting (X) in meters (input)
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* Northing : Northing (Y) in meters (input)
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* Latitude : Latitude (phi) in radians (output)
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* Longitude : Longitude (lambda) in radians (output)
added
removed
dt_cc/albers/albers.h
