ProjectionGetBase
=================

.. currentmodule:: globalmapper
.. py:function:: ProjectionGetBase (GM_Projection_t aProjIn) -> GM_Error_t32, GM_Projection_t

    Retrieves the underlying base projection that forms the basis for a given projection. For example, the underlying
    Transverse Mercator projection will be returned for a UTM projection. For core projections, like Transverse
    Mercator, the output will just match the input.

    :param GM_Projection_t aProjIn: projection to convert from (None for current)
    :returns: Error Code
    :rtype: GM_Error_t32
    :return: Projection on which the input projection is based
    :rtype: GM_Projection_t

Example
-------
The following is an example of ProjectionGetBase.

.. literalinclude:: ../../sample_tests/sample_code/ProjectionGetBase_sample.py
   :language: python

For more context refer to :doc:`the tutorial page on setting projections<../sampleCode/DemoProjections>`.