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Boat Tech Directory

Charts and Data

Open source, crowd-sourced and volunteer charts and other data sources.

  • Admiralty Datahub - API portal for the UK Hydrographic Office.
  • Antares Charts - Volunteer project for charting and pilotage of West Coast Scotland.
  • Citizen Sea - Citizen science marine biology app, iOS and Android.
  • C-Map - Global coastal, ocean, inland mapping and bathymetry. Mobile plotter, weather, route plotting mobile app for iOS and Android with free and premium options.
  • ENC Coverage Catalogue - Global catalogue of ENC (Electronic Navigation Chart) references.
  • Mapterhorn - Open Source terrain tiles for interactive web map visualizations.
  • Nautical Chart Catalogs - Machine readable index of free to use nautical charts.
  • OpenBathy - Open access bathymetry data.
  • Open Earth - Dutch open marine data, including detailed Wadden Sea mapping.
  • OpenSeaMap - Open sourced charts, in English, German, Spanish, French, Italian, Russian and Arabic.
  • OpenTide - Crowd sourced tidal data, with SignalK plugin.
  • OpenWaters - Open source nautical web map tiles: Seamap, a chart style rendered weekly from OpenStreetMap seamarks, AISCast, Sky Almanac, CrowdDepth and Seascape, global bathymetry merged from GEBCO and regional open sources. Plus tide predictions.
  • S-100 - Universal hydrographic data model, from the IHO (International Hydrographic Organization).