Land-only city emission mask database
Copyright OpenStreetMap contributors.
OpenStreetMap coastline data and this adapted mask database: Open Database License 1.0 (ODbL).
https://www.openstreetmap.org/copyright
https://opendatacommons.org/licenses/odbl/1-0/
Derived database is supplied as earth-land-mask.bin under ODbL-1.0.
Exact source URLs, snapshot metadata, hashes and adaptation details: earth-land-source.json.
Reproduction source: earth-land-builder.swift.
Coastline obtained through an unofficial mirror because primary osmdata.openstreetmap.de was unavailable. Mirror Last-Modified 2026-11-03 is not a guarantee of every coastline's survey age.
Natural Earth lake polygons: Public Domain. https://www.naturalearthdata.com/about/terms-of-use/
No GSHHG geometry is used in this version. The mask is a separate land/water database; NASA imagery and application code have their respective licenses.
Finite raster/simplification precision; not current tides, real-time electricity or live weather.