.. _eck1:

********************************************************************************
Eckert I
********************************************************************************

.. image:: ./images/eck1.png
   :scale: 50%
   :alt:   Eckert I


.. math::

    x &= 2 \sqrt{2/3\pi} \lambda (1- |\phi|/\pi)

    y &= 2 \sqrt{2/3\pi}\phi