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[DOC]: Userguide note on intersection #2931

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Jan 10, 2018
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[DOC]: Userguide note on intersection #2931

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13 changes: 13 additions & 0 deletions docs/iris/src/userguide/loading_iris_cubes.rst
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Expand Up @@ -233,6 +233,19 @@ then specific STASH codes can be filtered::
For advanced usage there are further examples in the
:class:`iris.Constraint` reference documentation.


Constraining across the dateline
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Occasionally you may need to constrain your cube with a region that crosses either
the dateline or the meridian. An example use-case of this is to extract the entire
Pacific Ocean from a cube whose longitudes are bounded by the dateline.

This functionality cannot be provided reliably using contraints. Instead you should use the
functionality provided by :meth:`cube.intersection <iris.cube.Cube.intersection>`
to extract this region.


.. _using-time-constraints:

Constraining on Time
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