Navionics ChartViewer: Nautical charts and sonar depth maps for boaters, online. OpenTopoMap: Free topographic map of the world from OpenStreetMap and elevation data.
| Navionics ChartViewer | OpenTopoMap | |
|---|---|---|
| Category | Hiking, Ski & Outdoor Maps | Hiking, Ski & Outdoor Maps |
| Coverage | Worldwide | Worldwide |
| Updates | Periodically | Continuously (community edits) |
| Data source | Navionics charts and community sonar logs | OpenStreetMap and SRTM elevation |
| Made by | Navionics (Garmin) | OpenTopoMap contributors |
| Price | Free | Free |
| Account | No account needed | No account needed |
| On phones | Phone app available | Works well on phones |
| Map view | Flat map | Flat map |
| Visits from ColorfulMaps | 0 | 0 |
| Open map | Open map |
What you can do with Navionics ChartViewer
- Nautical charts worldwide
- Community sonar depth contours
- Marinas and points of interest
What you can do with OpenTopoMap
- Contours and hill shading worldwide
- Paths and huts from OSM
- Free to use
Summary based on public information. Check each map's website for current features and prices.