The map is a proof of concept, making use of City of Toronto Open Data as it is made available. It is provided "as is".
The Zoning By-law Area and Building footprint and height data was downloaded from the City of Toronto Open Data website:
3D Massing: The 3D Massing datasets provides a spatial representation of building footprints and the building height.
Zoning By-Law: A spatial join was used to associate a zone category to the building footprints. Due to the way that some building footprints intersect two zone areas, some building footprints may have the incorrect zone color. The source dataset contains ESRI shapefiles that are part of the Zoning By-law 569-2013, the most recently available in this format.