Merge branch 'healpix' of github.com:davidhassell/cf-python into healpix

Author: davidhassell

Changelog.rst

@@ -15,7 +15,8 @@ Version NEXTVERSION
   (https://github.com/NCAS-CMS/cf-python/issues/909)
 * New method: `cf.Data.coarsen`
   (https://github.com/NCAS-CMS/cf-python/issues/909)
-* New function: `cf.locate`
+* New functions: `cf.locate`, `cf.healpix_max_refinement_level`,
+  `cf.healpix_indexing_schemes`
   (https://github.com/NCAS-CMS/cf-python/issues/909)
 * New keyword to `cf.read`: ``filesystem``
   (https://github.com/NCAS-CMS/cf-python/issues/931)

cf/functions.py

@@ -3437,7 +3437,7 @@ def _locate(lat, lon, f):
 
         raise NotImplementedError(
             f"Can't find cell locations for {f!r}: Can only find locations "
-            "for UGRID, HEALPix, or geometry cells"
+            "for HEALPix cells"
         )
 
     if np.abs(lat).max() > 90:

cf/mixin/fielddomain.py

@@ -3361,7 +3361,7 @@ def radius(self, default=None):
                 including `numpy` and `Data` objects. The units of the
                 radius are assumed to be metres, unless specified by a
                 `Data` object. If the special value ``'earth'`` is
-                given then the default radius taken as 6371229
+                given then the default radius is taken as 6371229
                 metres. If *default* is `None` an exception will be
                 raised if no unique datum can be found in the
                 coordinate reference constructs.

cf/test/test_Field.py

@@ -3462,7 +3462,6 @@ def my_mean(a, axis=None):
                 f.healpix_decrease_refinement_level(level, "mean")
 
         # Can't change refinement level for a 'nuniq' field
-        # TODOHEALPIX
         with self.assertRaises(ValueError):
             self.f13.healpix_decrease_refinement_level(0, "mean")