nc_remap: Horizontally and vertically remap a ncdf file
In r4ecology/rcdo: Tools to manipulate netcdf data

Description Usage Arguments Value Examples

This function allows you to remap a netcdf horizontally and vertically to any set of latlon coordinates.

1
2
3

nc_remap(ff, vars = NULL, coords = NULL, vert_depths = NULL,
  out_file = NULL, zip_file = FALSE, cdo_output = FALSE,
  remapping = "bil", na_value = NULL, overwrite = FALSE, ...)

`ff`	This is the file to regrid.
`vars`	Select the variables you want to regrid. If this is not given, all variables will be regridded.
`coords`	A 2 column matrix or data frame of the form (longitude, latitude) with coordinates for regridding. This can be regular or irregular. The function will calculate which it is.
`out_file`	The name of the file output. If this is not stated, a data frame will be the output.
`zip_file`	Do you want any output file to be zipped to save space. Default is FALSE.
`cdo_output`	set to TRUE if you want to see the cdo output
`remapping`	The type of remapping. bil = bilinear. nn = nearest neighbour. dis = distance weighted.
`na_value`	This is a value in the raw netcdf file that needs to be treated as an na.#'
`overwrite`	Do you want to overwrite out_file if it exists? Defaults to FALSE
`...`	optional arguments to be sent to nc_clip if you need to clip prior to remapping.#'

data frame or netcdf file.

# Remapping NOAA world ocean atlas data to the region around the UK
ff <- system.file("extdata", "woa18_decav_t01_01.nc", package = "rcdo")
# remapping to 1 degree resolution across all depth layers
uk_coords <- expand.grid(Longitude = seq(-20, 10, 1), Latitude = seq(48, 62, 1))
nc_remap(ff, vars = "t_an", coords = uk_coords)

# remapping to 1 degree resolution for 5, 50 and 100 metres in the region around the uk
nc_remap(ff, vars = "t_an", coords = uk_coords, vert_depths = c(5, 50, 100))