atemm99/national-map-tiles

Vietnam road + building tiles, as PMTiles

Vector tiles (Mapbox Vector Tile) for the whole of Vietnam in PMTiles v3 archives, baked from an OpenStreetMap extract. This repository exists to be read over HTTP range requests straight from a browser — Hugging Face serves 206 Partial Content with Access-Control-Allow-Origin: *, which is what the PMTiles client needs and what most free static hosts do not provide.

file	size	contents
national.pmtiles	430.4 MiB	roads, buildings, lane markings, lane arrows, junctions
signposts.pmtiles	0.7 MiB	destination signposts
national.pmtiles.provenance.json	—	which OSM snapshot this bake came from

Provenance

• Extract vietnam-latest.osm.pbf, OSM replication timestamp 2026-08-05T20:21:23Z
• Baked 2026-08-12T04:17:13.100Z
• Features 2,763,295 roads, 1,257,440 buildings, 3,233,838 junctions

Using it

// maplibre-gl + pmtiles
const p = new pmtiles.Protocol();
maplibregl.addProtocol("pmtiles", p.tile);
map.addSource("nat", {
  type: "vector",
  url: "pmtiles://https://huggingface.co/datasets/atemm99/national-map-tiles/resolve/main/national.pmtiles",
});

Zoom window is carried in the archive header; read it with pmtiles show.

What is measured and what is inferred

The road geometry and tags are OSM's. Three things in these tiles are estimates, labelled as such rather than survey:

• lane widths — derived from a per-class default lane count where lanes is untagged
• building heights — height / building:levels where tagged, otherwise a per-type default; every building carries a height_source saying which
• speed limits — maxspeed is tagged on under 1% of Vietnamese highway ways, so the consuming app falls back to the statutory default for the road class. That is a legal default, not a posted sign.

Do not treat any of the three as ground truth.

Licence

OpenStreetMap data, © OpenStreetMap contributors, available under the Open Database License 1.0. These tiles are a derived database: if you redistribute them or anything derived from them, you must keep the attribution and the share-alike terms.