virtual double MgCoordinateSystem::MeasureGreatCircleDistance	(	MgCoordinate *	coord1,
		MgCoordinate *	coord2
	)		[pure virtual]

Measures the great circle distance between two coordinates in coordinate system units.

Parameters:

coord1	(MgCoordinate) The first coordinate
coord2	(MgCoordinate) The second coordinate

Returns:

The great circle distance from coord1 to coord2 in coordinate system units