internal GeodeticMeasurement CalculateGeodeticMeasurement(Ellipsoid refEllipsoid, GlobalPosition start, GlobalPosition end, double tolerance)
{
// get the coordinates
GlobalCoordinates startCoords = start.Coordinates;
GlobalCoordinates endCoords = end.Coordinates;
// calculate elevation differences
double elev1 = start.ElevationMeters;
double elev2 = end.ElevationMeters;
double elev12 = (elev1 + elev2) / 2.0;
double phi1 = startCoords.Latitude.Radians;
double phi2 = endCoords.Latitude.Radians;
double phi12 = (phi1 + phi2) / 2.0;
double refA = refEllipsoid.SemiMajorAxisMeters;
double f = refEllipsoid.Flattening;
double a = refA + elev12 * (1.0 + f * Math.Sin(phi12));
Ellipsoid ellipsoid = Ellipsoid.FromAAndF(a, f);
GeodeticCurve averageCurve = CalculateGeodeticCurve(ellipsoid, startCoords, endCoords, tolerance);
return(new GeodeticMeasurement(averageCurve, elev2 - elev1));
}
public GeodeticMeasurement CalculateGeodeticMeasurement(Ellipsoid refEllipsoid, GlobalPosition start, GlobalPosition end) => this.CalculateGeodeticMeasurement(refEllipsoid, start, end, StandardTolerance);