OpenSeaMap: Free nautical chart with buoys, lights and harbours from OpenStreetMap. OS Maps: Ordnance Survey maps of Great Britain for walking and planning.
| OpenSeaMap | OS Maps | |
|---|---|---|
| Category | Hiking, Ski & Outdoor Maps | Hiking, Ski & Outdoor Maps |
| Coverage | Worldwide | Great Britain |
| Updates | Continuously (community edits) | Periodically |
| Data source | OpenStreetMap and community depth data | Ordnance Survey |
| Made by | OpenSeaMap contributors | Ordnance Survey |
| Price | Free | Free + paid plan |
| Account | No account needed | Free to view, account for extras |
| On phones | Works well on phones | Phone app available |
| Map view | Flat map | Flat map |
| Visits from ColorfulMaps | 0 | 0 |
| Open map | Open map |
What you can do with OpenSeaMap
- Seamarks, lights and harbours
- Community depth data
- Sport and harbour layers
What you can do with OS Maps
- OS Explorer and Landranger maps (subscription)
- Plan and share routes
- Community routes
- 3D fly-through
Summary based on public information. Check each map's website for current features and prices.