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-rw-r--r--docs/source/operations/projections/hammer.rst28
1 files changed, 27 insertions, 1 deletions
diff --git a/docs/source/operations/projections/hammer.rst b/docs/source/operations/projections/hammer.rst
index e795b91b..e7f64687 100644
--- a/docs/source/operations/projections/hammer.rst
+++ b/docs/source/operations/projections/hammer.rst
@@ -6,5 +6,31 @@ Hammer & Eckert-Greifendorff
.. image:: ./images/hammer.png
:scale: 50%
- :alt: Hammer & Eckert-Greifendorff
+ :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