Share code of land mask

[SarahAlidoost]

We want a data preparation notebook that shows how to prepare land mask data.

from pathlib import Path
import xarray as xr

from climanet.utils import regrid_to_boundary_centered_grid

file_name = data_folder / "era5_lsm.nc"  # downloded from cds
lsm_regrid = regrid_to_boundary_centered_grid(lsm_data.lsm, roll = True)
lsm_mask = lsm_regrid.rename({'latitude': 'lat', 'longitude': 'lon'})
lsm_mask_bool = lsm_mask.astype(bool)
lsm_mask_bool.to_netcdf(data_folder / "era5_lsm_bool.nc")

see also #65 and #96