Chapter 18
Offline Map Tiles
Menu → Tools → Offline Tiles downloads OpenStreetMap tiles for an area so that the map works without mobile data — for portable operation, in the car, or abroad.
| Setting | Choices |
|---|---|
| Area around | My QTH, or Where the map is now — move the map to the region first (a holiday, an event, a SOTA summit), then open Offline Tiles. The choice is remembered. |
| Coverage radius | 10, 20 (default), 30, 50, 75, 100 or 150 km around that point. |
| Detail level | Up to zoom 10, 11, 12 (default) or 13. Tiles from zoom 8 up are downloaded. |
Downloaded tiles are used by the map automatically. When the phone has no connection, a downloaded OpenStreetMap tile is shown in place of any tile from the selected layer (CARTO, Sat or Topo) that is not cached, so the map keeps working whichever layer you use. The Android Auto map uses the same cache.
The dialog estimates the number of tiles and megabytes before you start (about 15 kB a tile) and shows the cache in use out of 200 MB. Download starts (and Stop stops) the download, with a progress bar; Clear Cache empties the tile cache.
Tip. Download on Wi-Fi. A 20 km radius to zoom 12 is a few hundred tiles; 75 km to zoom 13 is several thousand and may exceed the cache. To cover a wider area, use a lower detail level.
Note. Please respect the OpenStreetMap tile usage policy: download only the area you need, and not repeatedly.