Allow passing None for all coord-system optional args. (#3804)

* Allow passing None for all coord-system optional args. * Tests for coord-system default args behaviours. * CML fixes for detail changes to coord-systems. * Tests for netcdf load with no false_easting/northing, all relevant systems. * Add whatsnew entry. * Fix matplotlib capitalisation : conflict resolution error. * Handle optional None and parallels in _arg_default. Fix bug in Stereographic.true_scale_lat * Rationalise coord_system optional arg tests. * Fix arg_default parallels. * Fix exception tests for too-many/too-few parallels. * Update lib/iris/tests/unit/coord_systems/test_VerticalPerspective.py Co-authored-by: Martin Yeo <[email protected]> * Normalise all coord-system docstrings. Co-authored-by: Martin Yeo <[email protected]>
SciTools · Sep 15, 2020 · 3e9a094 · 3e9a094
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diff --git a/docs/iris/src/whatsnew/latest.rst b/docs/iris/src/whatsnew/latest.rst
@@ -92,6 +92,11 @@ Bugs Fixed
   loading. They are now available on the :class:`~iris.coords.CellMeasure` in
   the loaded :class:`~iris.cube.Cube`. See :pull:`3800`.
 
+* the netcdf loader can now handle any grid-mapping variables with missing
+  ``false_easting`` and ``false_northing`` properties, which was previously
+  failing for some coordinate systems.
+  See :issue:`3629`.
+
 
 Incompatible Changes
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