From 6b0567b3c01ada8412a446310af9784124453099 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Rivi=C3=A8re?= <fil@rezo.net>
Date: Fri, 21 Sep 2018 17:55:08 +0200
Subject: the Bertin 1953 projection

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 docs/source/operations/projections/index.rst       |   1 +
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diff --git a/docs/source/operations/projections/bertin1953.rst b/docs/source/operations/projections/bertin1953.rst
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+.. _bertin1953:
+
+********************************************************************************
+Bertin 1953
+********************************************************************************
+
+.. versionadded:: 5.2.0
+
++---------------------+-------------------------------+
+| **Classification**  |                               |
++---------------------+-------------------------------+
+| **Available forms** | Forward, spherical projection |
++---------------------+-------------------------------+
+| **Defined area**    | Global                        |
++---------------------+-------------------------------+
+| **Alias**           | bertin1953                    |
++---------------------+-------------------------------+
+| **Domain**          | 2D                            |
++---------------------+-------------------------------+
+| **Input type**      | Geodetic coordinates          |
++---------------------+-------------------------------+
+| **Output type**     | Projected coordinates         |
++---------------------+-------------------------------+
+
+
+
+.. figure:: ./images/bertin1953.png
+   :width: 500 px
+   :align: center
+   :alt:   Bertin 1953
+
+   proj-string: ``+proj=bertin1953``
+
+
+The Bertin 1953 projection is intended for making world maps. Created by Jacques Bertin
+in 1953, this projection was the go-to choice of the French cartographic school when they
+wished to represent phenomena on a global scale. The projection was formulated in 2017
+by Philippe Rivière for visionscarto.net.
+
+
+Usage
+###############################################################################
+
+The Bertin 1953 projection has no special options. Its rotation parameters
+are fixed. Here is an example of a forward projection with scale 1:
+
+    $ echo 122 47 | src/proj +proj=bertin1953 +R=1
+    0.72	0.73
+
+Parameters
+################################################################################
+
+.. note:: All parameters for the projection are optional.
+
+.. include:: ../options/R.rst
+
+.. include:: ../options/x_0.rst
+
+.. include:: ../options/y_0.rst
+
+Further reading
+################################################################################
+
+#. Philippe Rivière (2017). `Bertin Projection (1953) <https://visionscarto.net/bertin-projection-1953>`, Visionscarto.net.
diff --git a/docs/source/operations/projections/images/bertin1953.png b/docs/source/operations/projections/images/bertin1953.png
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diff --git a/docs/source/operations/projections/index.rst b/docs/source/operations/projections/index.rst
index a48eabe6..c2d24449 100644
--- a/docs/source/operations/projections/index.rst
+++ b/docs/source/operations/projections/index.rst
@@ -20,6 +20,7 @@ Projections map the spherical 3D space to a flat 2D space.
    apian
    august
    bacon
+   bertin1953
    bipc
    boggs
    bonne
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