monet.util.interp_util

Interpolation functions

Functions

constant_1d_xesmf([longitude, latitude])

Create a dataset with a constant latitude along a longitude array.

constant_lat_swathdefition([longitude, latitude])

Create a SwathDefinition with constant latitude along a longitude array.

constant_lon_swathdefition([longitude, latitude])

Create a SwathDefinition with constant longitude along a latitude array.

latlon_xarray_to_CoordinateDefinition([...])

Create pyresample SwathDefinition from xarray object.

lonlat_to_swathdefinition([longitude, latitude])

Create a pyresample SwathDefinition from longitude and latitude arrays.

lonlat_to_xesmf([longitude, latitude])

Create an empty xarray.Dataset with longitude and latitude coordinates.

nearest_point_swathdefinition([longitude, ...])

Create a SwathDefinition for a single point.
monet.util.interp_util.constant_1d_xesmf(longitude=None, latitude=None)

Create a dataset with a constant latitude along a longitude array.

Parameters:

  • longitude (array-like) – Array of longitude values.

  • latitude (float or array-like) – Latitude value(s) to use as a constant.

Returns:

A dataset with coordinates suitable for xesmf, where longitude varies but latitude is constant.

Return type:

xarray.Dataset

monet.util.interp_util.constant_lat_swathdefition(longitude=None, latitude=None)

Create a SwathDefinition with constant latitude along a longitude array.

Parameters:

  • longitude (array-like) – Array of longitude values, 1D or 2D.

  • latitude (float) – Constant latitude value to use for all points.

Returns:

A SwathDefinition with constant latitude.

Return type:

pyresample.geometry.SwathDefinition

monet.util.interp_util.constant_lon_swathdefition(longitude=None, latitude=None)

Create a SwathDefinition with constant longitude along a latitude array.

Parameters:

  • longitude (float) – Constant longitude value to use for all points.

  • latitude (array-like) – Array of latitude values, 1D or 2D.

Returns:

A SwathDefinition with constant longitude.

Return type:

pyresample.geometry.SwathDefinition

monet.util.interp_util.latlon_xarray_to_CoordinateDefinition(longitude=None, latitude=None)

Create pyresample SwathDefinition from xarray object.

Converts xarray latitude and longitude coordinate arrays into a pyresample CoordinateDefinition suitable for spatial interpolation.

Parameters:

  • longitude (2D xarray.DataArray) – Longitude array -> must be from -180 -> 180 and monotonically increasing.

  • latitude (2D xarray.DataArray) – Latitude array -> must be from -90 -> 90 and monotonically increasing.

Returns:

A coordinate definition object that can be used with pyresample.

Return type:

pyresample.geometry.CoordinateDefinition

monet.util.interp_util.lonlat_to_swathdefinition(longitude=None, latitude=None)

Create a pyresample SwathDefinition from longitude and latitude arrays.

Parameters:

  • longitude (array-like) – Longitude values, either 1D or 2D.

  • latitude (array-like) – Latitude values, either 1D or 2D.

Returns:

A SwathDefinition object for the provided coordinates.

Return type:

pyresample.geometry.SwathDefinition

monet.util.interp_util.lonlat_to_xesmf(longitude=None, latitude=None)

Create an empty xarray.Dataset with longitude and latitude coordinates.

Creates a minimal xarray Dataset with the provided coordinates to be used as a target grid for xESMF regridding.

Parameters:

  • longitude (array-like) – Longitude value(s).

  • latitude (array-like) – Latitude value(s).

Returns:

A dataset with lon/lat coordinates suitable for use with xesmf.

Return type:

xarray.Dataset

monet.util.interp_util.nearest_point_swathdefinition(longitude=None, latitude=None)

Create a SwathDefinition for a single point.

Used for nearest neighbor point-to-point interpolation.

Parameters:

  • longitude (float) – Longitude of the point.

  • latitude (float) – Latitude of the point.

Returns:

A SwathDefinition representing a single point.

Return type:

pyresample.geometry.SwathDefinition