NetCDF Extractor is used in this paper:
Evaluation of different gridded rainfall datasets for rainfed wheat yield prediction in an arid environment
Netcdf Extractor V1.0
CMIP5, Agmerra, CPC, TRMM, Cordex, etc...
What is NetCDF Extractor V1.0?
There are different software packages or various codes that may be used for manipulating or displaying NetCDF data. Some of them such as MATLAB programming language needs to enough information about provide codes in MATLAB as well as to know run codes and statements. Furthermore, the user should have to pay for MATLAB programming and install it in her/his system. Also, another of them are related to other programming languages such as R, NCL (NCAR Command Language), and etc. It has been mentioned before that working by many of this method to extract NetCDF files are so rough and complicated for users. Therefore, it is essential that users can extract their NC files in a user-friendly tool without any concerns. The NetCDF Extractor software is an easy tool for all users to extract their aim region from the main files. This tool is flexible to run for various datasets such as CMIP5 models, AgMERRA datasets, Aphrodite, CRU, CORDEX, and etc. In fact, this tool is NetCDF viewer, NetCDF converter, and NetCDF extractor. You can use it free as a NetCDF viewer.
In Version 1.1, We've added a "Grid Number Calculator" for converting coordinate to grid numbers.
What is NetCDF Format File?
Unidata's Network Common Data Form (NetCDF) was developed and is maintained at Unidata, part of the University Corporation for Atmospheric Research (UCAR) Community Programs (UCP). Unidata is funded primarily by the National Science Foundation. NetCDF is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. These data are quite large, which is another characteristic of real data. For a better understanding of NetCDF file, pay attention to the following concepts:
If a user would need to call and access meteorological data on a daily, monthly, and annual scale with different attributes for all regions of the world (with three and four dimensions), he/she cannot easily worked with them by other format files (Excel, text, etc.), due to these format of data have different attributes so they have large capacity and they have been called metadata. In this case, he/she faces a lot of trouble. Consequently, there is a need for a specific data format so that the data can be easily processed. Therefore, the NetCDF format file is so essential to the maintenance of metadata. This format of data files are quite large and many users need to access small subsets of large datasets -in various formats- for representing scientific data. These datasets may differ in size, number of dimensions and may represent data for different regions.
One NetCDF file may contain several datasets and each value in this datasets can be located in space (relative to each-based coordinates and) time. Also, it has a standard for data access and for representing scientific data. The libraries of NetCDF files have been consist of C, FORTRAN, C++, Java, and other languages. Programming interfaces are also available for Python, IDL, MATLAB, R, C++, Ruby, and Perl. NetCDF files should have the file name extension ".nc". NetCDF is run on Linux, Windows, and various other platforms.
Example of NetCDF Format File
A recent comprehensive example for NetCDF format file is Coupled ocean-atmosphere general circulation models intended for use in Intergovernmental Panel on Climate Change (IPCC), such as CMIP5 models. If you want to use CMIP5 data models, all these data are in NetCDF format files. There are some ways to read NetCDF format of data but most of them are tough to understand. We produce an easy user-friendly software that every user can run it for extracting NetCDF data file for a specific region.