public LatLonPoint projToLatLon(ProjectionPoint ppt, LatLonPointImpl destPoint) {
    /*
    Tor's algorithm
    public double[] inv(double[] lonlat)
      return rotate(lonlat, -polerotate, -lonpole, -sinDlat);
    */
    double[] lonlat = new double[2];
    lonlat[0] = ppt.getX();
    lonlat[1] = ppt.getY();

    double[] rlonlat = rotate(lonlat, -polerotate, -lonpole, -sinDlat);
    if (destPoint == null)
      destPoint = new LatLonPointImpl(rlonlat[1], rlonlat[0]);
    else
      destPoint.set(rlonlat[1], rlonlat[0]);

    if (show)
      System.out.println("Proj= " + ppt + " latlon= " + destPoint);
    return destPoint;
  }
public LatLonPoint projToLatLon ( ProjectionPoint ppt , LatLonPointImpl destPoint ) { double [ ] lonlat = new double [ 2 ] ; lonlat [ 0 ] = ppt . getX ( ) ; lonlat [ 1 ] = ppt . getY ( ) ; double [ ] rlonlat = rotate ( lonlat , - polerotate , - lonpole , - sinDlat ) ; if ( destPoint == null ) destPoint = new LatLonPointImpl ( rlonlat [ 1 ] , rlonlat [ 0 ] ) ; else destPoint . set ( rlonlat [ 1 ] , rlonlat [ 0 ] ) ; if ( show ) System . out . println ( "Proj= " + ppt + " latlon= " + destPoint ) ; return destPoint ; }
Transform a rotated longitude (X) and rotated latitude (Y) into a "real"
longitude-latitude pair.