def get_esmf_field(self, **kwargs): """ :keyword field: (``=None``) The field object. If ``None``, call :meth:`~ocgis.test.base.TestBase.get_field` :type field: :class:`~ocgis.Field` :param kwargs: Other keyword arguments to :meth:`ocgis.test.base.TestBase.get_field`. :returns: An ESMF field object. :rtype: :class:`ESMF.Field` """ from ocgis.conv.esmpy import ESMPyConverter field = kwargs.pop("field", None) or self.get_field(**kwargs) coll = SpatialCollection() coll.add_field(field) conv = ESMPyConverter([coll]) efield = conv.write() return efield
def test_get_ocgis_field_from_esmpy_field(self): np.random.seed(1) temporal = TemporalDimension(value=[3000.0, 4000.0, 5000.0]) level = VectorDimension(value=[10, 20, 30, 40]) realization = VectorDimension(value=[100, 200]) kwds = dict( crs=[None, CoordinateReferenceSystem(epsg=4326), Spherical()], with_mask=[False, True], with_corners=[False, True], dimensions=[False, True], drealization=[False, True], dtemporal=[False, True], dlevel=[False, True], ) for k in self.iter_product_keywords(kwds): row = VectorDimension(value=[1.0, 2.0]) col = VectorDimension(value=[3.0, 4.0]) if k.with_corners: row.set_extrapolated_bounds() col.set_extrapolated_bounds() value_tmin = np.random.rand(2, 3, 4, 2, 2) tmin = Variable(value=value_tmin, name="tmin") variables = VariableCollection([tmin]) grid = SpatialGridDimension(row=row, col=col) sdim = SpatialDimension(grid=grid, crs=k.crs) field = Field(variables=variables, spatial=sdim, temporal=temporal, level=level, realization=realization) if k.with_mask: mask = np.zeros(value_tmin.shape[-2:], dtype=bool) mask[0, 1] = True set_new_value_mask_for_field(field, mask) sdim.set_mask(mask) self.assertTrue(tmin.value.mask.any()) self.assertTrue(sdim.get_mask().any()) else: self.assertFalse(tmin.value.mask.any()) self.assertFalse(sdim.get_mask().any()) coll = SpatialCollection() coll[1] = {field.name: field} conv = ESMPyConverter([coll]) efield = conv.write() if k.dimensions: dimensions = {} if k.drealization: dimensions["realization"] = realization if k.dtemporal: dimensions["temporal"] = temporal if k.dlevel: dimensions["level"] = level else: dimensions = None ofield = get_ocgis_field_from_esmf_field(efield, crs=k.crs, dimensions=dimensions) self.assertIsInstance(ofield, Field) self.assertEqual(ofield.shape, efield.data.shape) # Test a default CRS is applied for the spherical case. if k.crs is None: self.assertEqual(ofield.spatial.crs, Spherical()) if k.drealization and k.dimensions: target = realization.value else: target = np.array([1, 2]) self.assertNumpyAll(ofield.realization.value, target) if k.dtemporal and k.dimensions: target = temporal.value else: target = np.array([1, 1, 1]) with self.assertRaises(CannotFormatTimeError): ofield.temporal.value_datetime self.assertFalse(ofield.temporal.format_time) self.assertNumpyAll(ofield.temporal.value, target) if k.dlevel and k.dimensions: target = level.value else: target = np.array([1, 2, 3, 4]) self.assertNumpyAll(ofield.level.value, target) self.assertNumpyAll(field.spatial.grid.value, ofield.spatial.grid.value) if k.with_corners: self.assertIsNotNone(ofield.spatial.grid.corners) self.assertNumpyAll(field.spatial.grid.corners, ofield.spatial.grid.corners) try: self.assertEqual(ofield.spatial.crs, sdim.crs) except AssertionError: # A "None" "crs" argument results in a default coordinate system applied to the output OCGIS field. self.assertIsNone(k.crs) ofield_tmin_value = ofield.variables[efield.name].value for arr1, arr2 in itertools.combinations([tmin.value.data, efield.data, ofield_tmin_value.data], r=2): self.assertNumpyAll(arr1, arr2, check_arr_type=False) rows = list(ofield.get_iter()) try: self.assertEqual(len(rows), len(value_tmin.flatten())) except AssertionError: self.assertTrue(k.with_mask) self.assertEqual(len(rows), len(tmin.value.compressed())) self.assertTrue(np.may_share_memory(ofield_tmin_value, efield.data)) self.assertFalse(np.may_share_memory(ofield_tmin_value, tmin.value))