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.. _hammer:
********************************************************************************
Hammer & Eckert-Greifendorff
********************************************************************************
.. figure:: ./images/hammer.png
:width: 500 px
:align: center
:alt: Hammer & Eckert-Greifendorff
proj-string: ``+proj=hammer``
Parameters
################################################################################
.. note:: All parameters are optional for the projection.
.. option:: +W=<value>
Set to 0.5 for the Hammer projection and 0.25 for the Eckert-Greifendorff
projection. :option:`+W` has to be larger than zero.
*Defaults to 0.5.*
.. option:: +M=<value>
:option:`+M` has to be larger than zero.
*Defaults to 1.0.*
.. include:: ../options/lon_0.rst
.. include:: ../options/R.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
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