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-.. _eck4:
-
-********************************************************************************
-Eckert IV
-********************************************************************************
-
-.. image:: ./images/eck4.png
- :scale: 50%
- :alt: Eckert IV
-
-
-.. math::
-
- x = \lambda(1+cos\phi) / \sqrt{ 2 + \pi }
-
-.. math::
- y = 2 \phi / \sqrt { 2 + \pi }
-
-