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.. _peirce_q:

********************************************************************************
Peirce Quincuncial
********************************************************************************

+---------------------+----------------------------------------------------------+
| **Classification**  | Miscellaneous                                            |
+---------------------+----------------------------------------------------------+
| **Available forms** | Forward spherical projection                             |
+---------------------+----------------------------------------------------------+
| **Defined area**    | Global                                                   |
+---------------------+----------------------------------------------------------+
| **Alias**           | peirce_q                                                 |
+---------------------+----------------------------------------------------------+
| **Domain**          | 2D                                                       |
+---------------------+----------------------------------------------------------+
| **Input type**      | Geodetic coordinates                                     |
+---------------------+----------------------------------------------------------+
| **Output type**     | Projected coordinates                                    |
+---------------------+----------------------------------------------------------+


.. figure:: ./images/peirce_q.png
   :width: 500 px
   :align: center
   :alt:   Peirce Quincuncial

   proj-string: ``+proj=peirce_q``

Parameters
################################################################################

.. note:: All parameters are optional.

.. include:: ../options/lon_0.rst

.. include:: ../options/R.rst

.. include:: ../options/x_0.rst

.. include:: ../options/y_0.rst