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.. _nsper:
********************************************************************************
Near-sided perspective
********************************************************************************
The near-sided perspective projection simulates a view from a height
:math:`h` similar to how a satellite in orbit would see it.
+---------------------+----------------------------------------------------------+
| **Classification** | Azimuthal. Neither conformal nor equal area. |
+---------------------+----------------------------------------------------------+
| **Available forms** | Forward and inverse spherical projection |
+---------------------+----------------------------------------------------------+
| **Defined area** | Global, although for one hemisphere at a time. |
+---------------------+----------------------------------------------------------+
| **Alias** | nsper |
+---------------------+----------------------------------------------------------+
| **Domain** | 2D |
+---------------------+----------------------------------------------------------+
| **Input type** | Geodetic coordinates |
+---------------------+----------------------------------------------------------+
| **Output type** | Projected coordinates |
+---------------------+----------------------------------------------------------+
.. figure:: ./images/nsper.png
:width: 500 px
:align: center
:alt: Near-sided perspective
proj-string: ``+proj=nsper +h=3000000 +lat_0=-20 +lon_0=145``
Parameters
################################################################################
Required
-------------------------------------------------------------------------------
.. include:: ../options/h.rst
Optional
-------------------------------------------------------------------------------
.. include:: ../options/lon_0.rst
.. include:: ../options/lat_0.rst
.. include:: ../options/R.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
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