Unidata

NetCDF 4.1 Release Notes

The Unidata NetCDF group is pleased to announce the new 4.1 release of the netCDF C/Fortran libraries. There are many exciting new features in this release, including the following.

• Support for remote data access with the new built-in OPeNDAP client. This client supports access to OPeNDAP data using the netCDF C/Fortran APIs: either the netcdf-3 API (the default) or the netcdf-4 API. The netcdf-3 interface access closely mimics the older, C++ based libnc-dap. The new client is written completely in C and uses our new client library, called oc, which has also been contributed to opendap.org, as a replacement for the previous Ocapi library.
• A completely rewritten ncgen, which now fully supports netCDF-4.
• A new nccopy utility for converting among netCDF format variants or to copy data from a DAP servers to a local variants or to copy data from a DAP server to a local netCDF file.
• Support for reading some existing HDF4/HDF5 data archives using the netCDF C/Fortran APIs.
• Support for parallel I/O on netCDF classic and 64-bit offset files using the parallel-netcdf (formerly pnetcdf) library from Argonne National Lab/Northwestern U.
• A new nc-config script to help users build netCDF programs without having to deduce all the needed compiler options.
• Inclusion of the UDUNITS package for handling "units" attributes.
• Inclusion of the libcf library to assist in creating CF-compliant netCDF data.
• Support for true file synchronization (i.e. flushing data to disk) when using the netCDF nc_sync() API procedure to improve the timeliness of writes for other reading processes.

The 4.1 release source code is available from the following URL. ftp://ftp.unidata.ucar.edu/pub/netcdf/netcdf-4.1.tar.gz or ftp://ftp.unidata.ucar.edu/pub/netcdf/netcdf-4.1.tar.Z

Build it according to these instructions: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-install.html#Quick-Instructions

Report problems to the support email address:

support-netcdf@unidata.ucar.edu