Extract surface

This module computes a surface from all 3D variables. The result is a horizonal 2D field.

Usage

cdo_bottomvalue(ifile, isovalue = NULL, ofile = NULL)

cdo_isosurface(ifile, isovalue = NULL, ofile = NULL)

cdo_topvalue(ifile, isovalue = NULL, ofile = NULL)

Arguments

ifile

String with the path to the input file.

isovalue

FLOAT - Isosurface value

ofile

String with the path to the output file.

Details

bottomvalue  Extract bottom level
             This operator selects the valid values at the bottom level.
             The NetCDF CF compliant attribute positive is used to determine where top and bottom are.
             If this attribute is missing, low values are bottom and high values are top.
topvalue     Extract top level
             This operator selects the valid values at the top level.
             The NetCDF CF compliant attribute positive is used to determine where top and bottom are.
             If this attribute is missing, low values are bottom and high values are top.
isosurface   Extract isosurface
             This operator computes an isosurface. The value of the isosurfce is specified by the parameter isovalue.
             The isosurface is calculated by linear interpolation between two layers.