# Toronto derived building database

© OpenStreetMap contributors. Source: OpenStreetMap extract distributed by BBBike.org. https://www.openstreetmap.org/copyright

The derived database in derived-buildings.geojson is made available under the Open Database Licence (ODbL) 1.0: https://opendatacommons.org/licenses/odbl/1-0/ . The source tags, OSM IDs and inferred heights are included.

GLB/3D Tiles are produced from this database. Heights: height tag, else building:levels × 3m, else 9m. Footprints clipped to Toronto bbox. Native CDEM terrain samples anchor building bases; no geoid conversion was performed. Extrusions are present-day approximations, not historical reconstructions.