PolarCoordConverter (NASA World Wind)

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gov.nasa.worldwind.geom.coords
Class PolarCoordConverter

java.lang.Object
  gov.nasa.worldwind.geom.coords.PolarCoordConverter

public class PolarCoordConverter
extends Object
extends Object

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

Field Summary

static long POLAR_EASTING_ERROR


static long POLAR_NORTHING_ERROR


static long POLAR_RADIUS_ERROR


Method Summary

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