Implement HEALPix grids

Changelog.rst

@@ -1,8 +1,10 @@
 Version NEXTVERSION
--------------------
+----------------
 
-**2025-12-??**
+**2026-01-??**
 
+* Support for HEALPix grids
+  (https://github.com/NCAS-CMS/cfdm/issues/370)
 * Reduce the time taken to import `cfdm`
   (https://github.com/NCAS-CMS/cfdm/issues/361)
 

README.md

@@ -85,6 +85,7 @@ The ``cfdm`` package can:
 * create new field and domain constructs in memory,
 * write and append field and domain constructs to netCDF datasets on disk,
 * read, write, and manipulate UGRID mesh topologies,
+* read, write, and manipulate HEALPix grids,
 * read, write, and create coordinates defined by geometry cells,
 * read and write netCDF4 string data-type variables,
 * read, write, and create netCDF and CDL datasets containing

cfdm/constructs.py

@@ -297,7 +297,7 @@ def _del_construct(self, key, default=ValueError()):
             # --------------------------------------------------------
             # Since a cell method construct was deleted, check to see
             # if it was for climatological time, and if so reset the
-            # climatology status of approriate coordinate constructs.
+            # climatology status of appropriate coordinate constructs.
             # --------------------------------------------------------
             qualifiers = out.qualifiers()
             if "within" in qualifiers or "over" in qualifiers:
@@ -553,7 +553,7 @@ def _equals_domain_axis(
         return True
 
     def _set_climatology(self, cell_methods=None, coordinates=None):
-        """Set the climatology flag on approriate coordinate constructs.
+        """Set the climatology flag on coordinate constructs.
 
         The setting is based on the cell method constructs.
 

cfdm/data/data.py

@@ -6344,6 +6344,8 @@ def rechunk(
 
             {{balance: `bool`, optional}}
 
+            {{inplace: `bool`, optional}}
+
         :Returns:
 
             `Data` or `None`
@@ -6556,8 +6558,8 @@ def reshape(self, *shape, merge_chunks=True, limit=None, inplace=False):
         """Change the shape of the data without changing its values.
 
         It assumes that the array is stored in row-major order, and
-        only allows for reshapings that collapse or merge dimensions
-        like ``(1, 2, 3, 4) -> (1, 6, 4)`` or ``(64,) -> (4, 4, 4)``.
+        only allows for reshapings that collapse or merge dimensions,
+        e.g. ``(1, 2, 3, 4) -> (1, 6, 4)`` or ``(64,) -> (4, 4, 4)``.
 
         .. versionadded:: (cfdm) 1.11.2.0