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# Unidata NetCDF
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[![Build Status ](https://travis-ci.org/Unidata/netcdf-c.svg?branch=master )](https://travis-ci.org/Unidata/netcdf-c)
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### About
The Unidata network Common Data Form (**netCDF**) is an interface for
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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
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distributions available from Unidata provide Java, Fortran, Python,
and C++ interfaces. They have been tested on various common
platforms.
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#### Properties
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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.
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#### Use
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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
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netCDF form, see
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* [Software for Manipulating or Displaying NetCDF Data ](https://www.unidata.ucar.edu/netcdf/software.html )
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##### More information
For more information about netCDF, see
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* [Unidata Network Common Data Form (NetCDF) ](https://www.unidata.ucar.edu/netcdf/ )
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### Latest releases
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You can obtain a copy of the latest released version of netCDF
software for various languages:
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* [C library and utilities ](http://github.com/Unidata/netcdf-c )
* [Fortran ](http://github.com/Unidata/netcdf-fortran )
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* [Java](https://www.unidata.ucar.edu/downloads/netcdf-java/
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* [Python ](http://github.com/Unidata/netcdf4-python )
* [C++ ](http://github.com/Unidata/netcdf-cxx4 )
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### Copyright
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Copyright and licensing information can be found [here ](https://www.unidata.ucar.edu/software/netcdf/copyright.html ), as well as in the COPYRIGHT file accompanying the software
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### 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:
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* [Building NetCDF ](https://docs.unidata.ucar.edu/netcdf-c/current/winbin.html )
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### Documentation
A language-independent User's Guide for netCDF, and some other
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language-specific user-level documents are available from:
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* [Language-independent User's Guide ](https://www.unidata.ucar.edu/software/netcdf/documentation/NUG/index.html#user_guide )
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* [NetCDF-C Tutorial ](https://docs.unidata.ucar.edu/netcdf-c/current/tutorial_8dox.html )
* [Fortran-90 User's Guide ](https://www.unidata.ucar.edu/software/netcdf/documentation/historic/netcdf-f90/index.html#Top )
* [Fortran-77 User's Guide ](https://www.unidata.ucar.edu/software/netcdf/documentation/historic/netcdf-f77/index.html#Top )
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* [netCDF-Java/Common Data Model library ](https://docs.unidata.ucar.edu/netcdf-java/current/userguide/index.html )
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* [netCDF4-python ](http://unidata.github.io/netcdf4-python/ )
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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
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* [Unidata netCDF Mailing-Lists ](https://www.unidata.ucar.edu/netcdf/mailing-lists.html )
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### Feedback
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We appreciate feedback from users of this package. Please send comments, suggestions, and bug reports to < support-netcdf @ unidata . ucar . edu > .