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BUG: Handle CF CRS export errors in 'rio.write_crs' #595

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merged 1 commit into from
Oct 28, 2022
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BUG: Handle CF CRS export errors in 'rio.write_crs' #595

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1 change: 1 addition & 0 deletions docs/history.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ History

Latest
------
- BUG: Handle CF CRS export errors in `rio.write_crs` (discussion #591)

0.12.2
------
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8 changes: 5 additions & 3 deletions rioxarray/rioxarray.py
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Original file line number Diff line number Diff line change
Expand Up @@ -489,10 +489,12 @@ def write_crs(
)
# add grid mapping coordinate
data_obj.coords[grid_mapping_name] = xarray.Variable((), 0)
grid_map_attrs = {}
if get_option(EXPORT_GRID_MAPPING):
grid_map_attrs = pyproj.CRS.from_user_input(data_obj.rio.crs).to_cf()
else:
grid_map_attrs = {}
try:
grid_map_attrs = pyproj.CRS.from_user_input(data_obj.rio.crs).to_cf()
except KeyError:
pass
# spatial_ref is for compatibility with GDAL
crs_wkt = data_obj.rio.crs.to_wkt()
grid_map_attrs["spatial_ref"] = crs_wkt
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36 changes: 36 additions & 0 deletions test/integration/test_integration_rioxarray.py
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Expand Up @@ -2115,6 +2115,42 @@ def test_write_crs_cf__disable_grid_mapping():
assert "grid_mapping_name" not in test_da.spatial_ref.attrs


def test_write_crs_cf__grib_wkt():
# https://github.com/corteva/rioxarray/discussions/591
grib_rotated_wkt = """GEOGCRS["Coordinate System imported from GRIB file",
BASEGEOGCRS["Coordinate System imported from GRIB file",
DATUM["unnamed",
ELLIPSOID["Sphere",6371229,0,
LENGTHUNIT["metre",1,
ID["EPSG",9001]]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]]],
DERIVINGCONVERSION["Pole rotation (GRIB convention)",
METHOD["Pole rotation (GRIB convention)"],
PARAMETER["Latitude of the southern pole (GRIB convention)",-33.443381,
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]],
PARAMETER["Longitude of the southern pole (GRIB convention)",-93.536426,
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]],
PARAMETER["Axis rotation (GRIB convention)",0,
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]]],
CS[ellipsoidal,2],
AXIS["latitude",north,
ORDER[1],
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]],
AXIS["longitude",east,
ORDER[2],
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]]]"""

test_da = xarray.DataArray(1)
test_da.rio.write_crs(grib_rotated_wkt, inplace=True)


def test_write_crs__missing_geospatial_dims():
test_da = xarray.DataArray(
[1],
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