Vamoto public map database offer — ODbL 1.0

Copyright OpenStreetMap contributors. Vamoto's OSM-derived routing, POI,
address and scenic databases in the publicly distributed packs are offered
under the Open Database Licence 1.0:
https://opendatacommons.org/licenses/odbl/1-0/
Full licence text: https://vamoto.app/assets/legal/odbl.txt

These are data downloads, not an app installer or a paid API. No account,
subscription, licence key or agreement restricting ODbL rights is required.
Private ride/account data and user-imported tracks are not part of this offer.
The files are unencrypted. Preserve the licence and attribution when reusing
the covered databases; share-alike applies as described in ODbL. Nothing in
Vamoto's application/subscription terms limits those data rights.

1. GET https://tiles.vamoto.app/packs/v2/latest.json
   It identifies build_id, the catalog URL, catalog_bytes and catalog_sha256.
2. Download that catalog, check its SHA-256, decompress gzip, and parse JSON.
   Use its base URL, engine_version, formats, hier, cells and collections.
   Keep the build_id/catalog URL to identify the exact snapshot you received.
3. Each non-null artifact descriptor in cells/hier advertises bytes and SHA-256.
   Only request advertised artifacts; not every cell has every layer.
   Paths relative to catalog.base:
     routing/2/<cell-id>.gph     cell routing graph
     basemap/<cell-id>.mbtiles   vector map tiles (SQLite/MVT)
     aux/<cell-id>.json.gz       POIs, scenic stretches, traffic signals
     addr/<cell-id>.bin          streets and addresses
     basemap/overview.mbtiles   low-zoom overview
   Routing hierarchy artifacts are listed separately in hier and needed to
   reconstruct routing across cells: routing/0/<id>.gph and routing/1/<id>.gph.
   Artifact descriptors are [bytes, sha256] arrays. Each cell's h list names
   its required hierarchy IDs; use hier's level-keyed entries to resolve them.
4. Download the cells/hierarchy needed for a region or iterate all advertised
   files to obtain the complete published database. Use SHA-256 verification.
   Existing downloads are ordinary copies you may keep and reuse under ODbL.

Valhalla .gph files use the engine-version-specific Valhalla binary tile
format; the public upstream engine documents the underlying format:
https://github.com/valhalla/valhalla
Vamoto graph changes include surface inference and scenic/curve information.
These modified database bytes, not merely a link to a newer unmodified OSM
snapshot, are the subject of this offer.

Auxiliary .json.gz files decompress directly to UTF-8 JSON. The address files
use vaddr.v1 framing: bytes 0..3 are ASCII "VADR", byte 4 is version 1, bytes
5..8 are an unsigned little-endian 32-bit length N. Bytes 9..(9+N-1) contain
an independent gzip member with the streets JSON; the remaining bytes contain
another independent gzip member with the addresses JSON. Decompress each
member separately and parse UTF-8 JSON. No Vamoto app or account is needed.

MBTiles are standard SQLite databases; vector payloads use the OpenMapTiles
schema. Map design/rendered works retain separately stated OMT/Liberty design
licences. Natural Earth and any included Wikidata structured names retain
their public-domain/CC0 status.

The current published snapshot at creation of this notice:
  build_id: 20260904-valhalla-3.7.0-curvy-d252ff6+p0022
  catalog: https://tiles.vamoto.app/packs/v2/20260904-valhalla-3.7.0-curvy-d252ff6+p0022/catalog.0179c22de808.json.gz
  SHA-256: 0179c22de8087c0ab84823d93023c72b11d93fbd2fcb82da0044d75b6ed46b86

Use the release index for newer builds. For an unavailable previously supplied
snapshot or a format/access problem, contact support@vamoto.app and include
the build_id. Reports of missing access are compliance issues, not a request
to purchase another licence.