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.. _tpers:
********************************************************************************
Tilted perspective
********************************************************************************
+---------------------+----------------------------------------------------------+
| **Classification** | Azimuthal |
+---------------------+----------------------------------------------------------+
| **Available forms** | Forward and inverse, spherical projection |
+---------------------+----------------------------------------------------------+
| **Defined area** | Global |
+---------------------+----------------------------------------------------------+
| **Alias** | tpers |
+---------------------+----------------------------------------------------------+
| **Domain** | 2D |
+---------------------+----------------------------------------------------------+
| **Input type** | Geodetic coordinates |
+---------------------+----------------------------------------------------------+
| **Output type** | Projected coordinates |
+---------------------+----------------------------------------------------------+
.. image:: ./images/tpers.png
:scale: 50%
:alt: Tilted perspective
Tilted Perspective is similar to :ref:`nsper` (``nsper``) in that it simulates a
perspective view from a height. Where ``nsper`` projects onto a plane tangent to
the surface, Tilted Perspective orients the plane towards the direction of the
view. Thus, extra parameters specifying azimuth and tilt are required beyond
`nsper``'s ``h``. As with ``nsper``, ``lat_0`` & ``lon_0`` are
also required for satellite position.
Parameters
################################################################################
Required
-------------------------------------------------------------------------------
.. include:: ../options/h.rst
Optional
-------------------------------------------------------------------------------
.. option:: +azi=<value>
Bearing in degrees away from north.
*Defaults to 0.0.*
.. option:: +tilt=<value>
Angle in degrees away from nadir.
*Defaults to 0.0.*
.. include:: ../options/lon_0.rst
.. include:: ../options/lat_0.rst
.. include:: ../options/R.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
|
