Open data repositories are valuable for many reasons, including:

(1) they provide a source of insight and transparency into the domains and organizations that are represented by the data sets;

(2) they enable value creation across a variety of domains, using the data as the “fuel” for innovation, government transformation, new ideas, and new businesses;

(3) they offer a rich variety of data sets for data scientists to sharpen their data mining, knowledge discovery, and machine learning modeling skills; and

(4) they allow many more eyes to look at the data and thereby to see things that might have been missed by the creators and original users of the data.

Here are some sources and meta-sources of open data: