SaveProjectionToFile
====================

.. currentmodule:: globalmapper
.. py:function:: SaveProjectionToFile (string aFilename, GM_Projection_t aProj, uint32 aReserved=0) -> GM_Error_t32

	Saves a GM_Projection_t structure to a projection (PRJ) file.
	
	:param str aFilename: filename of projection file to save to
	:param GM_Projection_t aProj: projection to save
	:param uint32 aReserved: Reserved for future use; defaults to 0
	:returns: Error Code
	:rtype: GM_Error_t32

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

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

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