Package org.gavaghan.geodesy

Class GeodeticCalculator

java.lang.Object
org.gavaghan.geodesy.GeodeticCalculator
public class GeodeticCalculator extends Object

Implementation of Thaddeus Vincenty's algorithms to solve the direct and inverse geodetic problems. For more information, see Vincent's original publication on the NOAA website:

See http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
Author:
Mike Gavaghan

  • Constructor Details

    • GeodeticCalculator

      public GeodeticCalculator()

  • Method Details

    • calculateEndingGlobalCoordinates

      public GlobalCoordinates calculateEndingGlobalCoordinates(Ellipsoid ellipsoid, GlobalCoordinates start, double startBearing, double distance, double[] endBearing)
      Calculate the destination and final bearing after traveling a specified distance, and a specified starting bearing, for an initial location. This is the solution to the direct geodetic problem.
      Parameters:
      ellipsoid - reference ellipsoid to use
      start - starting location
      startBearing - starting bearing (degrees)
      distance - distance to travel (meters)
      endBearing - bearing at destination (degrees) element at index 0 will be populated with the result
      Returns:

    • calculateEndingGlobalCoordinates

      public GlobalCoordinates calculateEndingGlobalCoordinates(Ellipsoid ellipsoid, GlobalCoordinates start, double startBearing, double distance)
      Calculate the destination after traveling a specified distance, and a specified starting bearing, for an initial location. This is the solution to the direct geodetic problem.
      Parameters:
      ellipsoid - reference ellipsoid to use
      start - starting location
      startBearing - starting bearing (degrees)
      distance - distance to travel (meters)
      Returns:

    • calculateGeodeticCurve

      public GeodeticCurve calculateGeodeticCurve(Ellipsoid ellipsoid, GlobalCoordinates start, GlobalCoordinates end)
      Calculate the geodetic curve between two points on a specified reference ellipsoid. This is the solution to the inverse geodetic problem.
      Parameters:
      ellipsoid - reference ellipsoid to use
      start - starting coordinates
      end - ending coordinates
      Returns:

    • calculateGeodeticMeasurement

      public GeodeticMeasurement calculateGeodeticMeasurement(Ellipsoid refEllipsoid, GlobalPosition start, GlobalPosition end)

      Calculate the three dimensional geodetic measurement between two positions measured in reference to a specified ellipsoid.

      This calculation is performed by first computing a new ellipsoid by expanding or contracting the reference ellipsoid such that the new ellipsoid passes through the average elevation of the two positions. A geodetic curve across the new ellisoid is calculated. The point-to-point distance is calculated as the hypotenuse of a right triangle where the length of one side is the ellipsoidal distance and the other is the difference in elevation.

      Parameters:
      refEllipsoid - reference ellipsoid to use
      start - starting position
      end - ending position
      Returns: