Open Nautical Chart offers free sea charts for everybody. This chart are usable (offline) with several ship-plotters and Navigation Equipement.

OpenStreetMap is built by a community of like minded people who have local knowledge, who contribute and maintain data about roads, trails, cafés, railway stations, and much more, with this being replicated all over the world.

Through our contributions this powers map data on thousands of web sites, mobile apps, and many hardware devices.

The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data that helps others to unlock a deeper understanding of the world's oceans.

Learn about the United Kingdom and view printable maps of the British Isles and their surrounding land and water areas plus UK travel resources.

Street addresses weren’t designed for 2021. They aren’t accurate enough to specify precise locations, such as building entrances, and don’t exist for parks and many rural areas.

This makes it hard to find places and prevents people from describing exactly where help is needed in an emergency.

That’s why we created what3words.