globalmapper.CalcEnclosedArea
=============================

.. currentmodule:: globalmapper
.. py:function:: CalcEnclosedArea (GM_Point_t_array aPtList, int aNumPoints, GM_Projection_t aProj) -> GM_Error_t32, float

    Calculates the enclosed area of a region in square meters. The coordinates in *aPtList* are in the projection defined
    by *aProj*. If None is passed for *aProj* then the current global projection as returned by
    :doc:`GetProjection<globalmapper.GetProjection>` is assumed.

    :param GM_Point_t_array aPtList: list of points defining area
    :param int aNumPoints: the size of *aPtList*
    :param GM_Projection_t aProj: projection of points in list (use None for current projection returned by GetProjection)
    :returns: Error Code
    :rtype: GM_Error_t32
    :return: Enclosed area in square meters
    :rtype: float