remap: Grid remapping

In rcdo: Wrapper of 'CDO' Operators

Grid remapping

Description

Interpolation between different horizontal grids can be a very time-consuming process. Especially if the data are on an unstructured and/or a large grid. In this case the interpolation process can be split into two parts. Firstly the generation of the interpolation weights, which is the most time-consuming part. These interpolation weights can be reused for every remapping process with the operator remap. This operator remaps all input fields to a new horizontal grid. The remap type and the interpolation weights of one input grid are read from a NetCDF file. More weights are computed if the input fields are on different grids. The NetCDF file with the weights should follow the SCRIP convention. Normally these weights come from a previous call to one of the genXXX operators (e.g. genbil) or were created by the original SCRIP package.

Usage

cdo_remap(ifile, grid = NULL, weights = NULL, ofile = NULL)

Arguments

ifile	String with the path to the input file.
grid	STRING - Target grid description file or name
weights	STRING - Interpolation weights (SCRIP NetCDF file)
ofile	String with the path to the output file.

Value

Operators that output one or more files return a character vector to the output files.

Operators that output an indefinite number of files return a string with the basename of the files.

Operatos that don't return filenames return a character vector with the string output.

rcdo documentation built on June 8, 2025, 12:36 p.m.