v0.5.0

New features

• Create ESMF.Mesh objects from shapely.polygons (#24).
• New class SpatialAverager offers user-friendly mechanism to average a 2-D field over a polygon. Includes support to handle interior holes and multi-part geometries. (#24)
• Automatic detection of coordinates and computation of vertices based on cf-xarray. (#49)

Breaking changes

• Deprecate esmf_grid in favor of Grid.from_xarray
• Deprecate esmf_locstream in favor of LocStream.from_xarray
• Installation requires numpy>=1.16 and cf-xarray>=0.3.1

Bug fixes

• Fix serialization bug when using dask's distributed scheduler (#39).

Internal changes

• Subclass ESMF.Mesh and create from_polygon method
• Subclass ESMF.Grid and ESMF.LocStream and create from_xarray methods.
• New BaseRegridder class, with support for Grid, LocStream and Mesh objects. Not all regridding methods are supported for Mesh objects.
• Refactor Regridder to subclass BaseRegridder.

v0.4.0

0.4.0 (01-10-2020)

The git repo is now hosted by pangeo-data (https://github.com/pangeo-data/xESMF)

Breaking changes

• By default, weights are not written to disk, but instead kept in memory.
• Installation requires ESMPy 8.0.0 and up.

New features

• The Regridder object now takes a weights argument accepting a scipy.sparse COO matrix,
  a dictionary, an xarray.Dataset, or a path to a netCDF file created by ESMF. If None, weights
  are computed and can be written to disk using the to_netcdf method. This weights parameter
  replaces the filename and reuse_weights arguments, which are preserved for backward compatibility (#3).
  By @huard and @raphaeldussin
• Added documentation discussion how to compute weights from a shell using MPI, and reuse from xESMF (#12 ).
  By @raphaeldussin
• Add support for masks in :py:funcesmf_grid. This avoid NaNs to bleed into the interpolated values.
  When using a mask and the conservative regridding method, use a new method called
  conservative_normed to properly handle normalization (#1 ).
  By @raphaeldussin