{
  "taipeiVillages": {
    "file": "taipei-villages.geojson",
    "title": "臺北市里界圖",
    "provider": "臺北市政府民政局",
    "sourceUrl": "https://data.taipei/dataset/detail?id=6b17b31d-4e16-495e-95b1-9fd1f47c80d8",
    "downloadUrl": "https://data.taipei/api/frontstage/tpeod/dataset/resource.download?rid=145e30da-58f3-45db-a125-8adc3fde2620",
    "downloadedAt": "2026-09-19",
    "resourceUpdatedAt": "2026-06-23 14:55:20 Asia/Taipei",
    "archiveShapefileModifiedAt": "2026-06-17 14:48:00",
    "sourceFile": "G97_A_CAVLGE_P.shp",
    "sourceCrs": "TWD97 / TM2 zone 121 (EPSG:3826)",
    "outputCrs": "WGS84 longitude, latitude (EPSG:4326)",
    "coordinatePrecisionDecimals": 6,
    "geometrySimplified": false,
    "villageCount": 456,
    "districtCount": 12,
    "idField": "CPTVID",
    "nameField": "VNAME",
    "districtField": "TNAME",
    "bandAssignment": "Sort village IDs ascending, then assign index modulo 10; ten artistic colour and animation groups, not geographically measured data.",
    "license": {
      "name": "政府資料開放授權條款－第1版 (Open Government Data License, version 1.0)",
      "url": "https://data.taipei/rule",
      "canonicalUrl": "https://data.gov.tw/license",
      "attribution": "臺北市政府民政局 2026 臺北市里界圖；依政府資料開放授權條款第1版釋出。已轉換座標與欄位供本視覺化使用。"
    }
  },
  "openStreetMapSnapshot": {
    "file": "taipei-osm.json",
    "title": "OpenStreetMap central Taipei roads and building footprints",
    "sourceUrl": "https://www.openstreetmap.org/#map=13/25.0525/121.54",
    "downloadUrl": "https://overpass-api.de/api/interpreter",
    "downloadDate": "2026-09-19",
    "osmBaseTimestamp": "2026-09-19T08:25:51Z",
    "queryFile": "central-taipei.overpassql",
    "license": "Open Data Commons Open Database License (ODbL) 1.0",
    "licenseUrl": "https://opendatacommons.org/licenses/odbl/1-0/",
    "attributionUrl": "https://www.openstreetmap.org/copyright",
    "attribution": "© OpenStreetMap contributors",
    "coverage": "Central Taipei, from Dadaocheng through downtown to Xinyi; intersected with official Taipei village boundaries.",
    "bounds": [
      121.49,
      25.015,
      121.59,
      25.09
    ],
    "sourceCrs": "WGS84 longitude, latitude (EPSG:4326)",
    "rawElementCount": 67101,
    "availableRoadSegments": 15925,
    "availableBuildingExteriors": 45980,
    "roadCount": 3000,
    "buildingCount": 5000,
    "buildingsWithOsmHeight": 315,
    "reductions": [
      "Roads and footprints intersected with the query bbox and union of 456 official Taipei village boundaries.",
      "Up to 2100 motorway/trunk/primary/secondary/tertiary segments prioritized, then spatial sampling to 3000 road segments; short segments below roughly 3 m omitted.",
      "Up to 300 explicitly tagged buildings at least 50 m tall prioritized; remaining footprints sampled across 0.004° × 0.003° cells by footprint area, for a total of 5000.",
      "Only building exteriors retained; courtyard holes omitted for wireframe rendering. Relation members are deduplicated against standalone ways.",
      "Coordinates rounded to six decimal places; no line simplification or fabricated geometry.",
      "height is the parsed OSM height tag in metres, or null. Building levels are not used to infer physical height. Manually controlled extrusion is artistic."
    ]
  }
}