Attribution is required for many of our data providers. Example language is provided below, but you are responsible for researching each project to follow their license terms. More details are available on the Data Sources page.

Required attribution:

© OpenStreetMap contributors

Required attribution for projects using elevation data:

© OpenStreetMap contributors, U.S. Geological Survey, and U.S. National Oceanic and Atmospheric Administration

Where to attribute

Attribution needs to "appear in a place that is reasonable to the medium or means you are utilising." Specific examples are given by the OSM Foundation and are generally best practices for giving credit to any source.