globalmapper.CalcDistance
=========================

.. currentmodule:: globalmapper
.. py:function:: CalcDistance (float aFromX, float aFromY, float aToX, float aToY, bool aLatLon) -> GM_Error_t32, float

    Calculates the great-circle distance in meters between two points. The points can either be specified as lat/lon
    values or in the current projection.

    :param float aFromX: start X/longitude coordinate
    :param float aFromY: start Y/latitude coordinate
    :param float aToX: stop X/longitude coordinate
    :param float aToY: stop Y/latitude coordinate
    :param bool aLatLon: TRUE - coordinates are lat/lon, FALSE - coordinates are in the current projection
    :returns: Error Code
    :rtype: GM_Error_t32
    :return: Distance in meters between the points
    :rtype: float