The MIT License (MIT) Copyright (c) 2019-2026 Akihiko Kusanagi Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. BACKGROUND GEOGRAPHY Source: Geospatial Information Authority of Japan (GSI), pale map tiles. https://maps.gsi.go.jp/development/ichiran.html https://www.gsi.go.jp/kikakuchousei/kikakuchousei40182.html Displayed with recolouring, reduced detail, and projection to the railway map. Original geography is not modified by the generated material imagery. On-demand fixed-region tile proxy; 24-hour HTTP cache. Fallback coastline: Natural Earth 1:10m land, public domain. https://www.naturalearthdata.com/about/terms-of-use/ https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_land.geojson Extracted to Tokyo extent; this dataset is lower resolution than the GSI map. RAILWAY RENDER GEOMETRY PILOT (2026-10-14) Source: MLIT National Land Numerical Information, N02 Railway Data, 2025 edition. https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N02-2025.html https://nlftp.mlit.go.jp/ksj/gml/data/N02/N02-25/N02-25_GML.zip Data basis: 2025-12-31. Retrieved 2026-10-14. CC BY 4.0 (2020 onward; dataset-specific terms apply). Processing: exact source route-name and operator mappings for representative routes; station proximity checked against existing memberStations where present, otherwise stations. Render geometry does not change route IDs, station order, membership, or train-position logic. Incomplete candidate geometry is excluded; no gaps or branches are inferred. Archive SHA-256: aaf76af133b2e771e538fabc4646d2e443dc1d5a67b221382a28d744e706cc9f RailroadSection GeoJSON SHA-256: 4269b076c0689db13cadf0d07801418b7215b2160ebf1278c508031cd08c4da2 SUPPLEMENTAL RAILWAY RENDER GEOMETRY (N02-24-DERIVED STATION-PAIR PATHS) Source: MLIT National Land Numerical Information N02-24 (2024-12-31), processed into explicit station-pair paths by Damonge / Minna no Chukankaneki. https://app.damonge.com/rail-meet/sources CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Processing: route-identified source edges were matched to adjacent stations in the existing route order and checked against the existing 100m anchor and 1.35 detour limits. Three selected paths are pinned in this repository; no station order or geometry smoothing is derived from this source. The source documents that parallel tracks, platforms and transfer walks are not modeled precisely and provides no warranty. Route/pair correspondence and anchor validation by In, Tokyo. SUPPLEMENTAL RAILWAY RENDER GEOMETRY (GSI EXPERIMENTAL RAILCL) Source: Geospatial Information Authority of Japan (GSI), experimental_railcl z16 GeoJSON tiles. https://github.com/gsi-cyberjapan/experimental_railcl Terms: GSI Content Terms (PDL 1.0; source citation and edited-data notice). https://web2.gsi.go.jp/kikakuchousei/kikakuchousei40182.html The experimental tiles are not designated Basic Survey Results. This is distinct from registered GSI Fundamental Geospatial Data, which are Basic Survey Results and may require authorization under the Survey Act. Processing: pinned route-code and station-code correspondences; only unique paths within the existing 100m station-anchor limit are included. GSI RailCL source dates vary by feature (2013-08-14 to 2017-02-14); this older linework is not treated as evidence of current infrastructure changes. The GSI linework was curated and processed by In, Tokyo. Weather surface atlas: generated material imagery, not an observation image, satellite photo, geographic source or measurement of clouds/rain at a station. Tokai Kisen ferry service notices (2026-10-08) Provider: Tokai Kisen Co.,Ltd.; supplied through ODPT. https://ckan.odpt.org/ja/dataset/odpt_tokai_kisen_all_lines Public Transportation Open Data Basic License; ODPT use rules and guideline. https://developer.odpt.org/terms Processing: effect-based state normalization, active-period/freshness filtering, duplicate suppression and exact GTFS scope matching. Original notice text retained. Service notices do not establish vessel positions or whole-vessel cancellation from port-specific interruptions. AIS positions remain independently observed. ADDITIONAL RAIL COVERAGE (2026-10-07) Providers: East Japan Railway Company (JR East), Tokyo Waterfront Area Rapid Transit (TWR), Metropolitan Intercity Railway (MIR), Yurikamome, Seibu Railway, Tokyo Metropolitan Bureau of Transportation, Yokohama Municipal Transportation. Supplied through the Public Transportation Open Data Center (ODPT). https://ckan.odpt.org/ja/dataset/odpt_jreast_tokyo_area https://ckan.odpt.org/ja/dataset/jreast_tokyo_area JR East GTFS static version 20260717: exact route/trip lookup derived from the official feed; incompatible station paths excluded. GTFS-Realtime coordinates are retained only while individual observations are valid (120 seconds). JR East and Seibu additions use the Challenge Limited License below, ending 2027-03-12; these sources stop at 2027-03-12 00:00 JST. Delete licensed data at termination. TWR, MIR, Yurikamome and Yokohama data use the Public Transportation Open Data Basic License and applicable Specific Terms of Use; Toei data use CC BY 4.0. https://developer.odpt.org/terms/data_basic_license.html https://creativecommons.org/licenses/by/4.0/ Timetable positions are estimates, not observed vehicle coordinates. Through services are joined only by published timetable references. New line/station geometry retains the Mini Tokyo 3D MIT attribution above; cropped to the existing map region. Static-only lines do not generate vehicles. No provider endorsement. ADDITIONAL RAIL TIMETABLE ESTIMATES (2026-10-04) Odakyu, Tokyu and Seibu station timetables; Sotetsu train timetables: ODPT. https://ckan.odpt.org/ Public Transportation Open Data Challenge Limited License (Challenge 2026). https://developer.odpt.org/challenge_license Authorization terminates on 2027-03-12; use must cease and licensed data must be deleted on termination. The new timetable sources stop conservatively at 2027-03-12 00:00 JST. Station departure estimates are not identified live vehicles or measured arrival/dwell times. OFFICIAL ROUTE SYMBOLS (2026-10-05) Tokyo Metro Co., Ltd.: G/M/H/T/C/Y/Z/N/F, supplied through ODPT. https://ckan.odpt.org/dataset/r_image-tokyometro Public Transportation Open Data Basic License and the Tokyo Metro image-data terms supplied in TokyoMetroStationNumberLineSymbol.zip. https://developer.odpt.org/terms/data_basic_license.html Modification: only perimeter-connected white background made transparent; original RGB pixels, enclosed white, lettering, dimensions and aspect retained. The supplied terms illustrate exterior transparency as permitted processing. These are assets for this application, not an independently reusable dataset. Bureau of Transportation, Tokyo Metropolitan Government: A/I/S/E/NT/SA. https://ckan.odpt.org/dataset/r_image-toei Creative Commons Attribution 4.0 International (CC BY 4.0). https://creativecommons.org/licenses/by/4.0/ Modification: official PDF artwork cropped and rasterized; subway measurement strokes omitted, exterior made transparent. Original filled shapes and lettering retained. The Sakura Tram symbol retains its specified 105% white outer rim. No endorsement or warranty by either provider or ODPT is implied. Other routes retain their colour dot and route name. Sources, processing and ID mapping: verification/detail-panel/route-symbols/COVERAGE.md. Additional bus GTFS-Realtime VehiclePosition (local implementation, 2026-10-06) Providers: 京王電鉄バス株式会社; 川崎鶴見臨港バス株式会社; 川崎市交通局; 公共交通オープンデータ協議会 https://ckan.odpt.org/ja/dataset/odpt_keio_bus_all_lines https://ckan.odpt.org/ja/dataset/odpt_kawasaki_tsurumi_rinko_bus_allrinko https://ckan.odpt.org/ja/dataset/odpt_transportation_bureau_city_of_kawasaki_all_lines Public Transportation Open Data Basic License and applicable Specific Terms of Use. https://developer.odpt.org/terms Processing: individual vehicle timestamps and supplied coordinates; 180-second validity; operator-scoped vehicle identifiers. Route names and destinations are not inferred when absent. No provider endorsement or accuracy warranty implied. Keio Bus Static GTFS metadata (edition 20261001, feed_version 20260915133014) Provider: 京王電鉄バス株式会社; 公共交通オープンデータ協議会 https://ckan.odpt.org/dataset/keio_bus_all_lines Public Transportation Open Data Basic License and applicable Specific Terms of Use. https://developer.odpt.org/terms Processing: exact trip/route metadata and explicit stop_headsign at the reported stop sequence. No timetable-derived bus positions or inferred destinations. Toei Bus GTFS-Realtime VehiclePosition Provider: 東京都交通局・公共交通オープンデータ協議会 https://ckan.odpt.org/ja/dataset/b_bus_gtfs_rt-toei CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Processing: decoded VehiclePosition; filtered missing/expired/out-of-area positions; joined official ODPT Bus metadata by vehicle ID and exact trip ID. No provider endorsement is implied. gtfs-realtime-bindings 2.2.0, MobilityData, Apache License 2.0 https://github.com/MobilityData/gtfs-realtime-bindings Used server-side to decode the official GTFS-Realtime protocol. 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See the License for the specific language governing permissions and limitations under the License. protobufjs runtime (BSD-3-Clause) This license applies to all parts of protobuf.js except those files either explicitly including or referencing a different license or located in a directory containing a different LICENSE file. --- Copyright (c) 2016, Daniel Wirtz All rights reserved. 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This support library is itself covered by the above license. long runtime: Apache-2.0; the Apache License 2.0 reproduced above applies. https://github.com/dcodeIO/long.js Aircraft live positions: OpenSky Network / adsb.fi https://openskynetwork.github.io/opensky-api/rest.html https://adsb.fi/ https://github.com/adsbfi/opendata/blob/main/README.md adsb.fi public API: personal, non-commercial use; attribution and homepage link required. Data/service may not be licensed, sold, rented or leased. No warranty. Processing: regional/airborne/freshness filtering; observation timestamps use OpenSky time_position or adsb.fi response now minus seen_pos, not retrieval time. SunCalc 1.9.0 — Vladimir Agafonkin (BSD-2-Clause) https://github.com/mourner/suncalc/tree/v1.9.0 Full license: /vendor/SUNCALC-LICENSE Raindrop FX 1.0.8 — SardineFish (MIT), commit bae4081bc15815bb094ea040a976dca083bbc3a5 https://github.com/SardineFish/raindrop-fx Full license and dependency notices: /vendor/RAINDROP-FX-LICENSE Raindrop FX dependency licenses: /vendor/ZOGRA-LICENSE, /vendor/APACHE-2.0, /vendor/GL-MATRIX-LICENSE ODPT Live bus additions (2026-10-07) VehiclePosition coordinates remain observations. Static GTFS data are used only for exact route/trip/stop labels, and have been transformed into ID dictionaries. No timetable vehicle estimates are generated. 関東バス — 公共交通オープンデータ基本ライセンス / Public Transportation Open Data Basic License https://ckan.odpt.org/ja/dataset/kanto_bus_all_lines Version: 20260817_20260824 西東京バス — 公共交通オープンデータ基本ライセンス / Public Transportation Open Data Basic License https://ckan.odpt.org/ja/dataset/nishi_tokyo_bus_nt_bus Version: 20261001_20261231 京成バス千葉ウエスト — Creative Commons Attribution 4.0 International (CC BY 4.0) https://ckan.odpt.org/ja/dataset/keisei_transit_bus_all_lines Version: 20260306 杉並区グリーンスローモビリティ — Creative Commons Attribution 4.0 International (CC BY 4.0) https://ckan.odpt.org/ja/dataset/tokyo_suginami_city_green_slow_mobility Version: Suginami_City_Guri_20260724 Public Transportation Open Data Basic License and specific conditions: https://developer.odpt.org/terms/data_basic_license.html CC BY 4.0: https://creativecommons.org/licenses/by/4.0/ Open-Meteo weather model data — Creative Commons Attribution 4.0 (CC BY 4.0) https://open-meteo.com/ https://creativecommons.org/licenses/by/4.0/ Model values are normalized and converted from period totals into visual intensity; these are not instantaneous measured precipitation rates. Weather data by RainViewer — Weather Maps API (past radar tiles) https://www.rainviewer.com/ https://www.rainviewer.com/api.html Attribution is retained in About. Radar frame time is distinct from weather-model time. IBM Plex Sans — SIL Open Font License 1.1 https://github.com/IBM/plex Unmodified variable font, self-hosted. Full license: /fonts/IBMPlexSans-OFL.txt Road structural layer --------------------- Source: MLIT National Land Numerical Information, Highway Time-Series Data (N06-25). https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N06-2025.html Current snapshot as of 2025-12-31, fetched 2026-10-08. License: Creative Commons Attribution 4.0 (current snapshot only). https://creativecommons.org/licenses/by/4.0/ Processed by In, Tokyo: current expressway extraction, extent clipping, 2m line simplification. IC/JCT coordinates remain source coordinates. Not a traffic or navigation service. Tokyo Bay Aqua-Line / Access Road supplement Source: MLIT National Land Numerical Information, Road Data (N13-24, mesh 5339). https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N13-2024.html Source date: 2024-09; fetched 2026-10-09 JST. License: CC BY 4.0. Processed by In, Tokyo: reviewed original centreline feature chain, 2m simplification. Main and access road form a combined display group; no inferred internal boundary. Route identity and existing JCT membership checked against NEXCO East Japan: https://www.e-nexco.co.jp/pressroom/cms_assets/pressroom/2022/12/19/01.pdf No N12 geometry or GSI annotation positions redistributed as road/node coordinates. Setagaya Line geometry supplement Source: Geospatial Information Authority of Japan (GSI), experimental_bvmap vector tiles, z16, data updated 2026-07-01. https://github.com/gsi-cyberjapan/gsimaps-vector-experiment Tiles: https://cyberjapandata.gsi.go.jp/xyz/experimental_bvmap/{z}/{x}/{y}.pbf GSI Content Terms / PDL 1.0; attribution required. Experimental tiles are not designated Basic Survey Results and are distinct from registered GSI Fundamental Geospatial Data. Curated and processed by In, Tokyo. Source tile IDs and route/station codes are retained in the pinned GeoJSON; only the uniquely validated Kamimachi–Miyanosaka pair is used. Aqua-Line facility supplement: © OpenStreetMap contributors public/road-aqualine-nodes.json is a separate OSM-derived database under ODbL 1.0. https://www.openstreetmap.org/copyright https://opendatacommons.org/licenses/odbl/1-0/ Facility IDs, versions, source timestamps and retrieval receipts are included. IC positions retain original named exit-node coordinates. Umihotaru PA uses the centroid of the source facility-area polygon, not a surveyed entrance position. N06/N13 geometry remains under its stated MLIT license; it is not OSM geometry.