xugrid.Ugrid2d.write_grid_mapping

Ugrid2d.write_grid_mapping(dataset, grid_mapping_name: str = None)

Use the CRS of the topology, if set, to write the CF grid_mapping attributes to a newly created mapping variable.

The grid mapping variable is stamped onto all data variables that share dimensions with this topology via the grid_mapping attribute, following CF conventions. Additionally, coordinate variables are also stamped, which is not strictly CF-compliant but is required for compatibility for e.g. QGIS-MDAL, which reads grid_mapping from coordinates rather than data variables.

Parameters:

• dataset (xr.Dataset)

• grid_mapping_name (str, optional) – Name of the CF grid mapping variable. If not provided (or None), defaults to f"{self.name}_crs" for this topology.

Returns:

dataset – Modified dataset with CF compliant CRS information.

Return type:

xr.Dataset