# Mandan vector tiles

The yard map reads the committed `tiles/mandan.pmtiles` archive directly in
the browser using MapLibre GL JS. No tile server or internet-hosted raster tile
service is required. The map omits the Protomaps symbol layers so it does not
need remotely hosted font glyphs or sprites; the basemap is fully local.

The archive covers Mandan and a modest surrounding margin:
`-101.05,46.74,-100.75,46.93`. PMTiles extraction is tile-aligned, so the
actual archive includes a little neighboring context.

## Build an update

Install the [`pmtiles` CLI](https://docs.protomaps.com/pmtiles/cli), choose a
dated Version 4 daily build from
[`maps.protomaps.com/builds`](https://maps.protomaps.com/builds), and run:

```bash
scripts/extract-mandan-pmtiles.sh \
  https://build.protomaps.com/YYYYMMDD.pmtiles
```

The script refuses to overwrite an existing archive. Move the old archive
aside before deliberately replacing it.