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builtin_coordinate_reference_systems.rst

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Built in coordinate systems

Note

In ISO 19111 terminology, what most people refer to as a Coordinate System is actually called a Coordinate Reference System (or CRS for short), with the term Coordinate System being used to refer to the :ref:`axes used <builtincs>`. PHPCoord's actual code uses the ISO naming system, although this documentation uses the more common version.

Tip

A constant has been defined for each and every built in CRS, with supporting docblocks that match the contents of the following pages. These should be searchable/available for autocomplete from inside your favourite IDE.

.. toctree::
    :maxdepth: 1

    builtin_crs_geocentric
    builtin_crs_geographic2d
    builtin_crs_geographic3d
    builtin_crs_projected
    builtin_crs_vertical
    builtin_crs_compound