Artifacts layout

baseUrl is a directory whose contents match what plateau-bridge produces:

<baseUrl>/<city>/
  manifest.json                       (n_buildings, sources, coverage stats)
  tile_index.json                     ({ tile_content_uri: 'style/<encoded>.arrow' })
  3dtiles/tileset.json
  3dtiles/<z>/<x>/<y>_bldg_Building.glb
  style/<urlencoded(tile_content_uri)>.arrow
  buildings.pmtiles                   (optional; only needed for fallback / overview)

Every tile_content_uri (the relative URI inside tileset.json) MUST appear in tile_index.json and have a matching style/*.arrow. The arrow file contains one row per building with at minimum a tile_feature_id column matching the _FEATURE_ID_0 / _BATCHID attribute on the GLB.

Hazard fields use the PLATEAU pipeline naming:

<type>_covered, <type>_coverage_source_ids, <type>_hit_source_ids,
<type>_coverage_confidence, <type>_depth_max | <type>_in_zone

with <type> ∈ river_flood | inland_flood | tsunami | storm_surge | landslide.

If you need a non-standard URL scheme (S3 paths, signed CDN, etc.) provide a custom resolver — see Custom resolver.