Consequently, there is a need for a specific data format so that the data can be easily processed. In this case, he/she faces a lot of trouble. 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. For a better understanding of NetCDF file, pay attention to the following concepts: These data are quite large, which is another characteristic of real data. NetCDF is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. Unidata is funded primarily by the National Science Foundation.
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). In Version 1.1, We've added a "Grid Number Calculator" for converting coordinate to grid numbers. In fact, this tool is NetCDF viewer, NetCDF converter, and NetCDF extractor.
This tool is flexible to run for various datasets such as CMIP5 models, AgMERRA datasets, Aphrodite, CRU, CORDEX, and etc.
The NetCDF Extractor software is an easy tool for all users to extract their aim region from the main files. Therefore, it is essential that users can extract their NC files in a user-friendly tool without any concerns. It has been mentioned before that working by many of this method to extract NetCDF files are so rough and complicated for users. Also, another of them are related to other programming languages such as R, NCL (NCAR Command Language), and etc. Furthermore, the user should have to pay for MATLAB programming and install it in her/his system. 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. There are different software packages or various codes that may be used for manipulating or displaying NetCDF data. NetCDF Extractor is used in this paper: Evaluation of different gridded rainfall datasets for rainfed wheat yield prediction in an arid environment