edu.nps.moves.disutil
Class CoordinateConversions

java.lang.Object
  edu.nps.moves.disutil.CoordinateConversions

public class CoordinateConversions
extends java.lang.Object

Converts DIS (x,y,z) rectilinear coordinates (earth-centered RH coordinate system) to latitude and longitude, in radians.

Author:

loyaj

Field Summary

static double	DEGREES_TO_RADIANS
static double	RADIANS_TO_DEGREES

Method Summary

static double[]	getXYZfromLatLonDegrees(double latitude, double longitude, double height) Converts lat long IN DEGREES and geodetic height (elevation) into DIS XYZ This algorithm also uses the WGS84 ellipsoid, though you can change the values of a and b for a different ellipsoid.
static double[]	getXYZfromLatLonRadians(double latitude, double longitude, double height) Converts lat long and geodetic height (elevation) into DIS XYZ This algorithm also uses the WGS84 ellipsoid, though you can change the values of a and b for a different ellipsoid.
static double[]	xyzToLatLonDegrees(double[] xyz) Converts DIS xyz world coordinates to latitude and longitude (IN DEGREES).
static double[]	xyzToLatLonRadians(double[] xyz) Converts DIS xyz world coordinates to latitude and longitude (IN RADIANS).

Methods inherited from class java.lang.Object

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

Field Detail

RADIANS_TO_DEGREES

public static final double RADIANS_TO_DEGREES

See Also:

Constant Field Values

DEGREES_TO_RADIANS

public static final double DEGREES_TO_RADIANS

See Also:

Constant Field Values

Method Detail

xyzToLatLonRadians

public static double[] xyzToLatLonRadians(double[] xyz)

Converts DIS xyz world coordinates to latitude and longitude (IN RADIANS). This algorithm may not be 100% accurate near the poles. Uses WGS84 , though you can change the ellipsoid constants a and b if you want to use something else. These formulas were obtained from Military Handbook 600008

Parameters:

xyz - A double array with the x, y, and z coordinates, in that order.

Returns:

An array with the lat, long, and elevation corresponding to those coordinates. Elevation is in meters, lat and long are in radians

xyzToLatLonDegrees

public static double[] xyzToLatLonDegrees(double[] xyz)

Converts DIS xyz world coordinates to latitude and longitude (IN DEGREES). This algorithm may not be 100% accurate near the poles. Uses WGS84 , though you can change the ellipsoid constants a and b if you want to use something else. These formulas were obtained from Military Handbook 600008

Parameters:

xyz - A double array with the x, y, and z coordinates, in that order.

Returns:

An array with the lat, lon, and elevation corresponding to those coordinates. Elevation is in meters, lat and long are in degrees

getXYZfromLatLonRadians

public static double[] getXYZfromLatLonRadians(double latitude,
                                               double longitude,
                                               double height)

Converts lat long and geodetic height (elevation) into DIS XYZ This algorithm also uses the WGS84 ellipsoid, though you can change the values of a and b for a different ellipsoid. Adapted from Military Handbook 600008

Parameters:

latitude - The latitude, IN RADIANS

longitude - The longitude, in RADIANS

height - The elevation, in meters

Returns:

a double array with the calculated X, Y, and Z values, in that order

getXYZfromLatLonDegrees

public static double[] getXYZfromLatLonDegrees(double latitude,
                                               double longitude,
                                               double height)

Converts lat long IN DEGREES and geodetic height (elevation) into DIS XYZ This algorithm also uses the WGS84 ellipsoid, though you can change the values of a and b for a different ellipsoid. Adapted from Military Handbook 600008

Parameters:

latitude - The latitude, IN DEGREES

longitude - The longitude, in DEGREES

height - The elevation, in meters

Returns:

a double array with the calculated X, Y, and Z values, in that order