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App 2.39.1, server 2.8.0: map roads from OpenFreeMap, on demand

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The public Overpass answered 429/502 and needs ~40 s a tile while the
car gives up after 8 s, so the server cancelled its queries and the
car's retries added load. Now the server fetches only the tiles a car
asks for, as OpenStreetMap vector tiles from OpenFreeMap (MAP_TILES_URL),
decodes the transportation layer with a small reader of its own, and
keeps each tile 30 days on a volume (MAP_CACHE_DIR). A fetch finishes
even after the car has stopped waiting; the car hears 503 with
Retry-After and gets the tile on its next try.

App: OpenFreeMap/OpenMapTiles attribution on the map, retry after 15 s.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6
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nils
2026-10-26 23:54:30 +01:00
co-authored by Claude Opus 5.5
parent d9c7c5ea9a
commit 6be2ba5193
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LICENSE.md
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@@ -21,8 +21,10 @@ software. `LICENSE` names all of them; keep every line.
## Map data
The roads of the "Grid with map" style are © OpenStreetMap contributors, under the
[Open Database Licence](https://opendatacommons.org/licenses/odbl/); the style shows that line
whenever it draws them. The server fetches them from an Overpass API (`server/maps.go`).
[Open Database Licence](https://opendatacommons.org/licenses/odbl/), in vector tiles
© OpenMapTiles served by [OpenFreeMap](https://openfreemap.org). The style shows
"OpenFreeMap © OpenMapTiles · © OpenStreetMap contributors" whenever it draws them. The server
fetches the tiles (`server/maps.go`).
## The EVHardware library