Unless otherwise noted, This project is in the public domain in the United States because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy at https://www2.usgs.gov/visual-id/credit_usgs.html#copyright
Additionally, we waive copyright and related rights in the work worldwide through the CC0 1.0 Universal public domain dedication.