gov.nasa.worldwind.geom.coords

Class PolarCoordConverter

java.lang.Object

gov.nasa.worldwind.geom.coords.PolarCoordConverter

public class PolarCoordConverter
extends java.lang.Object

Ported to Java from the NGA GeoTrans polarst.c and polarst.h code.

Field Summary

Fields

Modifier and Type	Field and Description
static long	POLAR_EASTING_ERROR
static long	POLAR_NORTHING_ERROR
static long	POLAR_RADIUS_ERROR

Method Summary

Modifier and Type	Method and Description
long	convertGeodeticToPolarStereographic(double Latitude, double Longitude) The function Convert_Geodetic_To_Polar_Stereographic converts geodetic coordinates (latitude and longitude) to Polar Stereographic coordinates (easting and northing), according to the current ellipsoid and Polar Stereographic projection parameters.
long	convertPolarStereographicToGeodetic(double Easting, double Northing) The function Convert_Polar_Stereographic_To_Geodetic converts Polar Stereographic coordinates (easting and northing) to geodetic coordinates (latitude and longitude) according to the current ellipsoid and Polar Stereographic projection Parameters.
double	getEasting()
double	getLatitude()
double	getLongitude()
double	getNorthing()
long	setPolarStereographicParameters(double a, double f, double Latitude_of_True_Scale, double Longitude_Down_from_Pole, double False_Easting, double False_Northing) The function setPolarStereographicParameters receives the ellipsoid parameters and Polar Stereograpic projection parameters as inputs, and sets the corresponding state variables.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

POLAR_EASTING_ERROR

public static final long POLAR_EASTING_ERROR

See Also:

Constant Field Values

POLAR_NORTHING_ERROR

public static final long POLAR_NORTHING_ERROR

See Also:

Constant Field Values

POLAR_RADIUS_ERROR

public static final long POLAR_RADIUS_ERROR

See Also:

Constant Field Values

Method Detail

convertGeodeticToPolarStereographic

public long convertGeodeticToPolarStereographic(double Latitude,
                                                double Longitude)

The function Convert_Geodetic_To_Polar_Stereographic converts geodetic coordinates (latitude and longitude) to Polar Stereographic coordinates (easting and northing), according to the current ellipsoid and Polar Stereographic projection parameters. If any errors occur, error code(s) are returned by the function, otherwise POLAR_NO_ERROR is returned.

Parameters:

Latitude - latitude, in radians

Longitude - Longitude, in radians

Returns:

error code

convertPolarStereographicToGeodetic

public long convertPolarStereographicToGeodetic(double Easting,
                                                double Northing)

The function Convert_Polar_Stereographic_To_Geodetic converts Polar Stereographic coordinates (easting and northing) to geodetic coordinates (latitude and longitude) according to the current ellipsoid and Polar Stereographic projection Parameters. If any errors occur, the code(s) are returned by the function, otherwise POLAR_NO_ERROR is returned.

Parameters:

Easting - Easting (X), in meters

Northing - Northing (Y), in meters

Returns:

error code

getEasting

public double getEasting()

getLatitude

public double getLatitude()

Returns:

Latitude in radians.

getLongitude

public double getLongitude()

Returns:

Longitude in radians.

getNorthing

public double getNorthing()

setPolarStereographicParameters

public long setPolarStereographicParameters(double a,
                                            double f,
                                            double Latitude_of_True_Scale,
                                            double Longitude_Down_from_Pole,
                                            double False_Easting,
                                            double False_Northing)

The function setPolarStereographicParameters receives the ellipsoid parameters and Polar Stereograpic projection parameters as inputs, and sets the corresponding state variables. If any errors occur, error code(s) are returned by the function, otherwise POLAR_NO_ERROR is returned.

Parameters:

a - Semi-major axis of ellipsoid, in meters

f - Flattening of ellipsoid

Latitude_of_True_Scale - Latitude of true scale, in radians

Longitude_Down_from_Pole - Longitude down from pole, in radians

False_Easting - Easting (X) at center of projection, in meters

False_Northing - Northing (Y) at center of projection, in meters

Returns:

error code