{ "retrieved": "2026-09-18", "regions": { "tokyo": { "features": 22168, "building_footprints": 14285, "with_height_or_levels": 1466 }, "asakusa": { "features": 10042, "building_footprints": 7783, "with_height_or_levels": 543 }, "ginza": { "features": 3880, "building_footprints": 1869, "with_height_or_levels": 160 }, "shibuya": { "features": 6354, "building_footprints": 3990, "with_height_or_levels": 1426 }, "fuji": { "features": 15572, "building_footprints": 13869, "with_height_or_levels": 116 } }, "buildings": { "source": "https://www.openstreetmap.org/copyright", "license": "ODbL 1.0", "method": "Source footprints, road centre lines and tagged heights are preserved. Missing heights use type-based estimates. Facade windows, roof equipment and temple/tower details are interpreted. Relations with holes and full survey-grade elevation are not reconstructed." }, "terrain": { "source": "https://maps.gsi.go.jp/development/demtile.html", "tiles": "https://cyberjapandata.gsi.go.jp/xyz/dem/11/{x}/{y}.txt", "grid": 257, "vertical_exaggeration": 1, "method": "GSI DEM resampled to 257×257, with no vertical exaggeration. Runtime objects use bilinear ground interpolation; the Tokyo district now includes the surrounding 9×7 km area. Land colour comes from georeferenced GSI aerial imagery. Cloud shading and sunlight are artistic approximations.", "tokyo_tiles": "https://cyberjapandata.gsi.go.jp/xyz/dem/14/{x}/{y}.txt" }, "camera": { "recorded_viewpoint": [ 139.004962, 35.333918 ], "fuji_view": "Oblique geographical overview. The marker records the supplied location; the flying camera is not claimed to match the exact photograph.", "roppongi": "Mori Tower east side, camera at 250 m above sea level; source https://www.city.minato.tokyo.jp/documents/123403/minatocitytouristmap2026_en2.pdf. Tokyo Tower retains the PLATEAU position and a published 333 m height.", "tower_close": "Elevated near view to reveal the open structure without foreground buildings; not a ground-level photograph reconstruction." }, "coastline": { "source": "https://www.naturalearthdata.com/", "license": "Public domain", "resolution": "1:110m" }, "models": "Blender sources: models/geo/*.blend; GLB compression: glTF Transform meshopt, 16-bit positions", "reference_conversation": "https://chatgpt.com/share/6aacc29d-63e0-83ec-b20f-692466fb6da1", "plateau": { "source": "https://api.plateauview.mlit.go.jp/datacatalog/3dtiles/13103-bldg-lod2-texture-latest/tileset.json", "mcp": "https://api.plateauview.mlit.go.jp/mcp", "dataset": "d_13103_bldg / 港区 2025 LOD2 texture", "credit": "東京都・港区 / 国土交通省 Project PLATEAU", "license_reference": "https://www.mlit.go.jp/plateau/site-policy/", "tiles": 99, "origin": [ 139.74543, 35.65858 ], "geoid_height_m": 36.594486635, "method": "Official b3dm meshes and texture atlases. RTC ECEF converted to local east/up/south, 100 metres per unit; GSI terrain at MSL. Textures resized to 512 pixels for distant tiles and 2048 at landmarks; meshopt position quantization 16-bit; no silhouette simplification. Texture-based glazing roughness and night lighting are artistic approximations, not surveyed material classifications. Some source buildings have no facade texture. Meshes cast cached directional shadows. Untextured surfaces receive a neutral mineral base and interpreted window divisions; their original mesh silhouette is preserved." }, "sky": { "source": "Original image generated with built-in imagegen, 2026-09-18", "file": "images/cinematic-sky.png", "role": "Illustrative sky and reflection environment, not weather evidence", "prompt": "images/cinematic-sky-prompt.txt" }, "imagery": { "source": "https://maps.gsi.go.jp/development/ichiran.html", "credit": "国土地理院 地理院タイル（全国最新写真）", "tiles": "https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg", "fuji": "132 tiles at zoom 13; 3072×2816 WebP mosaic projected onto the DEM", "tokyo": "80 tiles at zoom 15; 2560×2048 WebP mosaic projected onto the DEM", "method": "Label-free aerial images used as the terrain material; not map screenshots. Tile mosaics mix capture dates and seasons. Snow, vegetation and shadows are source imagery, not a reconstruction of August weather. Imagery bounds and projection metadata are in geodata/*-imagery.json." }, "city_context": { "source": "https://www.openstreetmap.org/copyright", "license": "ODbL 1.0", "file": "geodata/tokyo-context.json", "features": 15880, "method": "True footprints outside PLATEAU coverage, within five kilometres of Tokyo Tower. Tagged heights retained; absent heights estimated by building type. Small distant footprints omitted for performance. Colours use valid building:colour tags when supplied, otherwise a neutral shade; window materials are interpreted." }, "districts": { "record": "geodata/district-sources.json", "description": "Official PLATEAU 2025 textured LOD2: 58 Taito tiles and 30 Chuo tiles. GSI terrain/aerial imagery and OSM context retain separate district coordinates. Four simplified Sensoji structures are replaced with original detail informed by official dimensions; not a survey." }, "tokyo_tower": { "sources": [ "https://www.tokyotower.co.jp/plan/towerpedia/", "https://kunishitei.bunka.go.jp/heritage/detail/101/00009591" ], "file": "tokyo-tower.js", "method": "Original open steel-lattice geometry replacing only data248 feature95 (bldg_7aff4a51-be8b-405b-abe4-ac489697cbc8), 333 m overall, 80 m foot separation, 150/250 m observation decks. Original PLATEAU base elevation retained. Individual steel members, joints and FootTown facades are visual approximations.", "triangles": 23052 }, "font": { "source": "https://github.com/lxgw/LxgwWenKai-Screen", "license": "fonts/wenkai-OFL.txt", "file": "fonts/tokyo-wenkai.woff2", "method": "Renamed local subset with GB2312, kana and page characters." } }