healpix: Change healpix resolution

In rcdo: Wrapper of 'CDO' Operators

Change healpix resolution

Description

Degrade or upgrade the resolution of a healpix grid.

Usage

cdo_hpdegrade(ifile, nside = NULL, order = NULL, power = NULL, ofile = NULL)

cdo_hpupgrade(ifile, nside = NULL, order = NULL, power = NULL, ofile = NULL)

Arguments

ifile	String with the path to the input file.
nside	INTEGER - The nside of the target healpix, must be a power of two [default: same as input].
order	STRING - Pixel ordering of the target healpix ('nested' or 'ring').
power	FLOAT - If non-zero, divide the result by (nside[in]/nside[out])**power. power=-2 keeps the sum of the map invariant.
ofile	String with the path to the output file.

Details

hpdegrade  Degrade healpix
           Degrade the resolution of a healpix grid. The value of the target pixel is the mean of the source pixels.
hpupgrade  Upgrade healpix
           Upgrade the resolution of a healpix grid. The values of the target pixels is the value of the source pixel.

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.