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.. _latlon:
********************************************************************************
Lat/long (Geodetic alias)
********************************************************************************
Passes geodetic coordinates through unchanged.
+---------------------+--------------------------------------------------------+
| **Aliases** | latlon, latlong, lonlat, longlat |
+---------------------+--------------------------------------------------------+
| **Domain** | 2D |
+---------------------+--------------------------------------------------------+
| **Input type** | Geodetic coordinates |
+---------------------+--------------------------------------------------------+
| **Output type** | Geodetic coordinates |
+---------------------+--------------------------------------------------------+
.. note:: Can not be used with the :program:`proj` application.
Parameters
################################################################################
No parameters will affect the output of the operation if used on it's own.
However, the parameters below can be used in a declarative manner when used with
:program:`cs2cs` or in a :ref:`transformation pipeline <pipeline>` .
.. include:: ../options/ellps.rst
.. option:: +datum=<value>
Declare the datum used with the coordinates. Available options are:
``WGS84``, ``GGRS87``, ``NAD38``, ``NAD27``, ``potsdam``, ``carthage``,
``hermannskogel``, ``ire65``, ``nzgd49``, ``OSGB336``.
.. note::
The ``+datum`` option is primarily available to support the legacy
use of PROJ.4 strings as CRS descriptors and should in most cases
be avoided.
.. option:: +towgs84=<list>
A list of three or seven :ref:`Helmert <helmert>` parameters that maps
the input coordinates to the WGS84 datum.
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