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.. _omerc:
********************************************************************************
Oblique Mercator
********************************************************************************
.. image:: ./images/omerc.png
:scale: 50%
:alt: Oblique Mercator
Parameters
################################################################################
Central point and azimuth method
--------------------------------------------------------------------------------
.. option:: +alpha=<value>
Azimuth of centerline clockwise from north at the center point of the line.
If :option:`+gamma` is not given then :option:`+alpha` determines the value of
:option:`+gamma`.
.. option:: +gamma=<value>
Azimuth of centerline clockwise from north of the rectified
bearing of centre line. If :option:`+alpha` is not given, then
:option:`+gamma` is used to determine :option:`+alpha`.
.. option:: +lonc=<value>
Longitude of the central point.
.. option:: +lat_0=<value>
Latitude of the central point.
Two point method
--------------------------------------------------------------------------------
.. option:: +lon_1=<value>
Longitude of first point.
.. option:: +lat_1=<value>
Latitude of first point.
.. option:: +lon_2=<value>
Longitude of second point.
.. option:: +lat_2=<value>
Latitude of second point.
Optional
--------------------------------------------------------------------------------
.. option:: +no_rot
Do not rotate axis.
.. option:: +no_off
Do not offset origin to center of projection.
.. include:: ../options/k_0.rst
.. include:: ../options/lon_0.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
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