meteodatalab.operators.regrid¶

Regridding operator.

Functions

`icon2geolatlon`(field)	Remap ICON native grid data to the geolatlon grid.
`icon2rotlatlon`(field)	Remap ICON native grid data to the rotated latlon grid.
`regrid`(field, dst, resampling[, src])	Regrid a field.

Classes

RegularGrid(crs, nx, ny, xmin, xmax, ymin, ymax)

Class defining a regular grid.

class meteodatalab.operators.regrid.RegularGrid(crs: CRS, nx: int, ny: int, xmin: float, xmax: float, ymin: float, ymax: float)[source]¶

Class defining a regular grid.

crs¶

Coordinate reference system.

Type:: CRS

nx¶

Number of grid points in the x direction.

Type:: int

ny¶

Number of grid points in the y direction.

Type:: int

xmin¶

Coordinate of the first grid point in the x direction.

Type:: float

xmax¶

Coordinate of the last grid point in the x direction.

Type:: float

ymin¶

Coordinate of the first grid point in the y direction.

Type:: float

ymax¶

Coordinate of the last grid point in the y direction.

Type:: float

classmethod from_field(field: DataArray)[source]¶

Extract grid parameters from grib metadata.

Parameters:: field (xarray.DataArray) – field containing the relevant metadata.

classmethod parse_regrid_operator(op: str)[source]¶

Parse fieldextra out_regrid_target string.

Parameters:: op (str) – fieldextra out_regrid_target definition i.e. crs,xmin,ymin,xmay,ymax,dx,dy.

to_crs(crs: str, **kwargs)[source]¶

Return a new grid in the given coordinate reference system.

Parameters:: crs (str) – The coordinate reference system in which the output grid should be defined.
Returns:: Output grid in the given coordinate reference system.
Return type:: RegularGrid or subtype

meteodatalab.operators.regrid.icon2geolatlon(field: DataArray) → DataArray[source]¶

Remap ICON native grid data to the geolatlon grid.

Parameters:: field (xarray.DataArray) – A field with data in the ICON native grid.
Returns:: Field with data remapped to the geolatlon grid.
Return type:: xarray.DataArray

meteodatalab.operators.regrid.icon2rotlatlon(field: DataArray) → DataArray[source]¶

Remap ICON native grid data to the rotated latlon grid.

Parameters:: field (xarray.DataArray) – A field with data in the ICON native grid.
Returns:: Field with data remapped to the rotated latlon grid.
Return type:: xarray.DataArray

meteodatalab.operators.regrid.regrid(field: DataArray, dst: RegularGrid, resampling: Resampling, src: RegularGrid | None = None)[source]¶

Regrid a field.

Parameters:

field (xarray.DataArray) – Input field defined on a regular grid in rotated latlon coordinates.
dst (RegularGrid) – Destination grid onto which to project the field.
resampling (Resampling) – Resampling method, alias of rasterio.warp.Resampling.
src (RegularGrid, optional) – Definition of the input field grid

Raises:

ValueError – If the input field is not defined on a regular grid in rotated latlon or if the input field geography metadata does not have consistent grid parameters.

Returns:

Field regridded in the destination grid.

Return type:

xarray.DataArray