The NetCDF CF reader#
This document is part of a series teaching how to Create a multi-variable image / animation from a coupled ice sheet - climate simulation
You can use the NetCDF CF reader to load data on regular (and distorted) grids.
The reader cannot handle negative time information (will give an error along the lines of “start + count exceeds dimension bounds”).
The reader cannot display distorted grids in the plane (e.g. most ocean models)
The reader cannot handle a 2D field that has a depth axis (use
cdo -setzaxis,surface INFILE OUTFILEor
ncwa -a NAME_OF_DEPTH_DIMENSION INFILE OUTFILEto prepare files; affects a lot of MPI-OM output).
Ocean models tend to give positive values for depth. That requires a couple switches in the reader, see Load NEMO 3D data with the netCDF CF reader.
For MPI-OM velocities, first use
cdo -mrotuvbto get data to North/South East/West orientation, and interpolate u and v onto the cell centers.
Nemo grids cause weird hick-ups.
One file with many time steps tends to be a lot faster than many files with one timestep each.
Open a file with the standard NetCDF Reader#
File->Open or the top-left icon (see The Paraview main screen), chose the desired file and select
NetCDF Reader when prompted.
For a spherical projection use
Spherical Coordinates and (for most cases) use
Replace Fill Value With Nan
(Return to Load the vegetation data)