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.. _hammer:

********************************************************************************
Hammer & Eckert-Greifendorff
********************************************************************************

.. image:: ./images/hammer.png
   :scale: 50%
   :alt:   Hammer & Eckert-Greifendorff


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