Data sources and licences

Bandra–Kurla Complex (Mumbai) city scenes on the home page: building footprints, water and places from Overture Maps (release 2026-10-21.0; ODbL and CDLA-Permissive-2.0), which combines Google Open Buildings, Microsoft ML Buildings and OpenStreetMap. Building heights and first-detected years are model estimates from Google Open Buildings 2.5D Temporal v1 (CC BY 4.0). River exposure is a proximity screening indicator (within 200 m of major water), not a flood model.

Rishikesh–Haridwar terrain: Copernicus Sentinel-2 L2A imagery (2018, 2021, 2024) via AWS Open Data / Element 84; Copernicus DEM GLO-30 (© DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018, provided under COPERNICUS by the European Union and ESA); ESA WorldCover 10 m 2021 v200 (CC BY 4.0). Relief is exaggerated 2× vertically.

Product recordings on the home page are screen recordings of the real VachakEarth app against a project seeded from the same open data.

Interactive maps in the app: OpenStreetMap tiles (© OpenStreetMap contributors, ODbL), Sentinel-2 cloudless 2016 by EOX IT Services GmbH (CC BY 4.0, contains modified Copernicus Sentinel data 2016) and OpenTopoMap (CC-BY-SA).

No political boundaries are drawn. Any map depicting India’s external boundary must follow the official Survey of India boundary.

Libraries: Three.js, React Three Fiber, GSAP, Lenis, MapLibre GL, Turf.