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.. _cea:
********************************************************************************
Equal Area Cylindrical
********************************************************************************
Equal area cylindrical has a number of named specializations,
such as `Gall–Peters https://en.wikipedia.org/wiki/Gall%E2%80%93Peters_projection`_ (lat_ts=45),
`Behrmann https://en.wikipedia.org/wiki/Behrmann_projection`_ (lat_ts=30), and
`Lambert cylindrical equal-area https://en.wikipedia.org/wiki/Lambert_cylindrical_equal-area_projection`_ (lat_ts=0).
+---------------------+----------------------------------------------------------+
| **Classification** | Cylindrical |
+---------------------+----------------------------------------------------------+
| **Available forms** | Forward and inverse, spherical and ellipsoidal |
+---------------------+----------------------------------------------------------+
| **Defined area** | Global |
+---------------------+----------------------------------------------------------+
| **Alias** | cea |
+---------------------+----------------------------------------------------------+
| **Domain** | 2D |
+---------------------+----------------------------------------------------------+
| **Input type** | Geodetic coordinates |
+---------------------+----------------------------------------------------------+
| **Output type** | Projected coordinates |
+---------------------+----------------------------------------------------------+
.. figure:: ./images/cea.png
:width: 500 px
:align: center
:alt: Equal Area Cylindrical
proj-string: ``+proj=cea``
Parameters
################################################################################
.. note:: All parameters are optional for the Equal Area Cylindrical projection.
.. include:: ../options/lat_ts.rst
.. include:: ../options/lon_0.rst
.. include:: ../options/ellps.rst
.. include:: ../options/R.rst
.. include:: ../options/k_0.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
.. note::
``lat_ts`` and ``k_0`` are mutually exclusive. If ``lat_ts``
is specified, it is equivalent to setting ``k_0`` to
:math:`\frac{\cos \phi_{ts}}{\sqrt{1 - e^2 \sin^2 \phi_{ts}}}`
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