8714066b18
re: issue https://github.com/Unidata/netcdf-c/issues/1278 re: issue https://github.com/Unidata/netcdf-c/issues/876 re: issue https://github.com/Unidata/netcdf-c/issues/806 * Major change to the handling of 8-byte parameters for nc_def_var_filter. The old code was not well thought out. * The new algorithm is documented in docs/filters.md. * Added new utility file plugins/H5Zutil.c to support * Modified plugins/H5Zmisc.c to use new algorithm the new algorithm. * Renamed include/ncfilter.h to include/netcdf_filter.h and made it an installed header so clients can access the new algorithm utility. * Fixed nc_test4/tst_filterparser.c and nc_test4/test_filter_misc.c to use the new algorithm * libdap4/ fixes: * d4swap.c has an error in the endian pre-processing such that record counts were not being swapped correctly. * d4data.c had an error in that checksums were being computed after endian swapping rather than before. * ocinitialize() was never being called, so xxdr bigendian handling was never set correctly. * Required adding debug statements to occompile * Found and fixed memory leak in ncdump.c Not tested: * HDF4 * Pnetcdf * parallel HDF5
Unidata NetCDF
About
The Unidata network Common Data Form (netCDF) is an interface for scientific data access and a freely-distributed software library that provides an implementation of the interface. The netCDF library also defines a machine-independent format for representing scientific data. Together, the interface, library, and format support the creation, access, and sharing of scientific data. The current netCDF software provides C interfaces for applications and data. Separate software distributions available from Unidata provide Java, Fortran, Python, and C++ interfaces. They have been tested on various common platforms.
Properties
NetCDF files are self-describing, network-transparent, directly
accessible, and extendible. Self-describing means that a netCDF file
includes information about the data it contains. Network-transparent
means that a netCDF file is represented in a form that can be accessed
by computers with different ways of storing integers, characters, and
floating-point numbers. Direct-access means that a small subset of a
large dataset may be accessed efficiently, without first reading through
all the preceding data. Extendible means that data can be appended to
a netCDF dataset without copying it or redefining its structure.
Use
NetCDF is useful for supporting access to diverse kinds of scientific data in heterogeneous networking environments and for writing application software that does not depend on application-specific formats. For information about a variety of analysis and display packages that have been developed to analyze and display data in netCDF form, see
More information
For more information about netCDF, see
Latest releases
You can obtain a copy of the latest released version of netCDF software for various languages:
Copyright
Copyright and licensing information can be found here, as well as in the COPYRIGHT file accompanying the software
Installation
To install the netCDF-C software, please see the file INSTALL in the netCDF-C distribution, or the (usually more up-to-date) document:
Documentation
A language-independent User's Guide for netCDF, and some other language-specific user-level documents are available from:
- Language-independent User's Guide
- NetCDF-C Tutorial
- Fortran-90 User's Guide
- Fortran-77 User's Guide
- netCDF-Java/Common Data Model library
- netCDF4-python
A mailing list, netcdfgroup@unidata.ucar.edu, exists for discussion of the netCDF interface and announcements about netCDF bugs, fixes, and enhancements. For information about how to subscribe, see the URL
Feedback
We appreciate feedback from users of this package. Please send comments, suggestions, and bug reports to support-netcdf@unidata.ucar.edu.