globalmapper.SpatialSymmetricDifference
=======================================

.. currentmodule:: globalmapper
.. py:function:: SpatialSymmetricDifference (GM_LayerHandle_t32 aLayer1, GM_LayerHandle_t32 aLayer2, GM_SpatialOps_Params_t aParams) -> GM_Error_t32

	The **Symmetrical Difference** operation creates a new layer consisting of areas of the non-overlapping regions in
	the first and second input layers; overlapping regions are removed. In other words, it finds all regions exclusively
	in one layer OR the other, but not in both. Attributes for features in the new layer are copied from their original
	feature, from either the first or second input layer.
	
	:param GM_LayerHandle_t32 aLayer1: First layer in operation
	:param GM_LayerHandle_t32 aLayer2: Second layer in operation
	:param GM_SpatialOps_Params_t aParams: Parameters
	:returns: Error Code
	:rtype: GM_Error_t32