globalmapper.SpatialTransform
=============================

.. currentmodule:: globalmapper
.. py:function:: SpatialTransform (GM_SpatialTransforms_t16 aTransform, GM_LayerHandle_t32 aLayer, GM_SpatialOps_Params_t aParams, GM_FeatureGrouping_t8 aGrouping, str aStr) -> GM_Error_t32

	General Transform function. Can be used to perform any of the one-layer spatial transform functions available in
	Global Mapper, using *aTransform* to define which transform function.

	Currently, the available transform functions and their parameter values are:

	-   :doc:`SpatialMBR <globalmapper.SpatialMBR>` - *GM_SpatialTransform_MBR*
	-   :doc:`SpatialCenter <globalmapper.SpatialCenter>` - *GM_SpatialTransform_Center*
	-   :doc:`SpatialConvexHull <globalmapper.SpatialConvexHull>` - *GM_SpatialTransform_ConvexHull*
	-   :doc:`SpatialConcaveHull <globalmapper.SpatialConcaveHull>` - *GM_SpatialTransform_ConcaveHull*
	-   :doc:`SpatialBuffer <globalmapper.SpatialBuffer>` - *GM_SpatialTransform_Buffer*
	
	:param GM_SpatialTransforms_t16 aTransform: Transform type
	:param GM_LayerHandle_t32 aLayer: Input layer
	:param GM_SpatialOps_Params_t aParams: Parameters
	:param GM_FeatureGrouping_t8 aGrouping: Grouping type
	:param str aStr: The attribute list string; may be an empty string
	:returns: Error Code
	:rtype: GM_Error_t32