co.paralleluniverse.geodesy

Class Spherical

java.lang.Object

co.paralleluniverse.geodesy.Spherical

public final class Spherical
extends Object

Computations on spheres. This class is used by Datum for local spherical approximations of the datum.

Constructor Summary

Constructors

Constructor and Description
Spherical()

Method Summary

Methods

Modifier and Type	Method and Description
static double	angleDiff(double lat1, double lng1, double lat2, double lng2)
static double	angleDiffHaversine(double lat1, double lng1, double lat2, double lng2)
static double	bearing(double lat1, double lng1, double lat2, double lng2)
static double	destEast(double R, double d, double lat1, double lng1)
static double	destEast(double R, double d, double sinD_R, double cosD_R, double lat1, double lng1, double sinLat1, double cosLat1)
static double[]	destination(double R, double d, double brng, double lat1, double lng1)
static double	destNorth(double R, double d, double lat1)
static double	destNorth(double R, double d, double sinD_R, double cosD_R, double lat1, double sinLat1, double cosLat1)
static double	distance(double R, double lat1, double lng1, double lat2, double lng2)
static double	distance(double R, double lat1, double lng1, double alt1, double lat2, double lng2, double alt2)
static double	distanceHaversine(double R, double lat1, double lng1, double lat2, double lng2)
static double	distanceHaversine(double R, double lat1, double lng1, double alt1, double lat2, double lng2, double alt2)
static double	distanceWithAlt(double R, double d, double alt1, double alt2)
static double	intersectLat(double R, double d, double lat0, double lat) Intersects given latitude lat with the spherical circle centered on latitude lat0 of spherical radius d.

Methods inherited from class java.lang.Object

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

Constructor Detail

Spherical

public Spherical()

Method Detail

distance

public static double distance(double R,
              double lat1,
              double lng1,
              double lat2,
              double lng2)

distance

public static double distance(double R,
              double lat1,
              double lng1,
              double alt1,
              double lat2,
              double lng2,
              double alt2)

angleDiff

public static double angleDiff(double lat1,
               double lng1,
               double lat2,
               double lng2)

distanceHaversine

public static double distanceHaversine(double R,
                       double lat1,
                       double lng1,
                       double lat2,
                       double lng2)

distanceHaversine

public static double distanceHaversine(double R,
                       double lat1,
                       double lng1,
                       double alt1,
                       double lat2,
                       double lng2,
                       double alt2)

distanceWithAlt

public static double distanceWithAlt(double R,
                     double d,
                     double alt1,
                     double alt2)

angleDiffHaversine

public static double angleDiffHaversine(double lat1,
                        double lng1,
                        double lat2,
                        double lng2)

destination

public static double[] destination(double R,
                   double d,
                   double brng,
                   double lat1,
                   double lng1)

Parameters:

R -

lat1 -

lng1 -

d - Distance traveled.

brng - Bearing (in radians) - 0 is north

Returns:

destNorth

public static double destNorth(double R,
               double d,
               double lat1)

destNorth

public static double destNorth(double R,
               double d,
               double sinD_R,
               double cosD_R,
               double lat1,
               double sinLat1,
               double cosLat1)

destEast

public static double destEast(double R,
              double d,
              double lat1,
              double lng1)

destEast

public static double destEast(double R,
              double d,
              double sinD_R,
              double cosD_R,
              double lat1,
              double lng1,
              double sinLat1,
              double cosLat1)

bearing

public static double bearing(double lat1,
             double lng1,
             double lat2,
             double lng2)

Parameters:

lat1 -

lng1 -

lat2 -

lng2 -

Returns:

Bearing (in radians)

intersectLat

public static double intersectLat(double R,
                  double d,
                  double lat0,
                  double lat)

Intersects given latitude lat with the spherical circle centered on latitude lat0 of spherical radius d.
To the intersections’ longitude, given a return value X are: lon0 + X and lon0 - X, with lon0 being the circle’s center’s longitude.

Parameters:

R - The sphere’s radius

d - The circle’s radius

lat - The latitude to intersect

lat0 - The latitude of the circle’s center

Returns: