# Sources and license

© OpenStreetMap contributors. Building footprints, mapped roads, water and the derived facts tables are ODbL data. Attribution and license: https://www.openstreetmap.org/copyright .

USGS elevation point queries provide the draft's real terrain samples. A draft is a machine extrusion, not an authored roof survey. Detailed samples use the separately documented September 8 Work review; see samples/SOURCES.md.

The selected product tier describes geometric detail. Current heights, material matches and hidden faces require evidence and remain listed on the building inspection page until resolved. Owner-provided photos and screen crops require an explicit rights attestation and mapping-service screening. Accepted evidence is scoped to the buyer's building; it never enters the shared canonical cache. Materials and geometry are separate from OSM-derived database facts.

Three.js and Leaflet retain their included license notices in vendor/. Street View opens as a link for human inspection; mapping-service imagery is not an input to geometry generation.