An official website of the United States government.

The .gov means it’s official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar.

This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely.

Updates to our data submission forms

We've been working to improve our data submission process, and now support the SHA512 checksum for ensuring data integrity. We have also added the ability to directly upload your files at the time of submission. See our dataset submission overview for a summary of the dataset submission process.