GetPixelElevation
=================

.. currentmodule:: globalmapper
.. py:function:: GetPixelElevation (GM_LayerHandle_t32 aLayer, sint32 aRow, sint32 aCol) -> GM_Error_t32, float

    Retrieves the elevation at a given pixel location from a provided elevation layer. If the layer does not contain a
    valid elevation sample at the provided pixel location (i.e. it is a "no data" value), GM_Error_NoDataAtLocation will
    be returned.

    :param GM_LayerHandle_t32 aLayer: Layer to get elevation from
    :param sint32 aRow: Y coord of pixel (0 is topmost)
    :param sint32 aCol: X coord of pixel (0 is leftmost)
    :returns: Error Code
    :rtype: GM_Error_t32
    :return: Elevation at location in meters
    :rtype: float