{"source":"OpenStreetMap public API","date":"2026-09-13","coordinate_reference_system":"WGS84 EPSG:4326","license":"ODbL-1.0","attribution":"© OpenStreetMap contributors","license_url":"https://www.openstreetmap.org/copyright","raw_sources":[{"file":"osm-quadrant-0.xml","bytes":13135004,"sha256":"c577e9d0b8af136dc966651c21140965ea02694b31e6eed1735b64aa317813a9"},{"file":"osm-quadrant-1.xml","bytes":6424518,"sha256":"21c4aecaf9f1db0aca64585742fb74f5b2ed799aad1e5ed52762af5bf78a9af4"},{"file":"osm-quadrant-2.xml","bytes":12644727,"sha256":"432854334c2b97c58d9b44c809284bb0bf48196c561228665ff1a5e094618b68"},{"file":"osm-quadrant-3.xml","bytes":5569348,"sha256":"c8fc4cd99dc0d35fc56bb059e83cbe7e8bd20579ea8e3457ad8875304566b579"}],"height_status":{"source_height":205,"source_levels":432,"missing":724},"skipped":{"incomplete_relation_water":7,"incomplete_relation_buildings":1},"known_limitations":["Footprint accuracy and real-world completeness have not been field verified.","Missing heights remain null; no heights have been invented.","Road lines include full source ways and can extend beyond requested bbox.","Only complete polygon relations are included.","Polygon label positions use arithmetic vertex means and are not surveyed entrance positions.","Island filtering accepts features with at least one vertex inside the island; boundary-crossing features can be retained.","The viewer uses flat ground and schematic road widths. It does not reconstruct bridge elevation, terrain, roofs or facades.","Downloaded bbox misses the narrow westernmost island tip (island minimum longitude 113.3481711; download minimum 113.35)."],"source_download_counts":{"buildings":2179,"roads":6204,"water":117,"areas":689,"places":101},"source_download_bbox":[113.35,23.015,113.43,23.08],"scope":"小谷围岛：按真实岛边界筛选的公开地图记录；不代表逐栋完整或实测验收。","island_source_url":"https://www.openstreetmap.org/relation/6900823","display_bbox":[113.3461711,23.0294241,113.41691619999999,23.0812265],"counts":{"buildings":1361,"context":4953,"labels":14},"display_height_policy":{"source_height":"use recorded metres","source_levels":"estimate levels times 3 metres","missing":"18 metre visual placeholder; not a real height"},"rendered_counts":{"buildings":1360,"height_status":{"source_height":205,"source_levels":432,"missing":723},"skipped_tiny_footprint":1},"rendering_skips":[{"id":"way/1388055730","reason":"All footprint parts are smaller than 1 square metre; source record retained."}],"asset_sha256":{"buildings.geojson":"9033eb1403f3c08c21e8b512881384655f57d61f57feec5a881ba02042fab7fd","context.geojson":"2e3cc36460e6dff9e4bfd60fe7b4ffbfa95a69fc540f4bd4ade2af5e93de2feb","places.geojson":"279859a4dd955c96dbac57222fd918a983dd1ef85a4553417784ab5f4e69cd57"}}