This is the work of data journalist Patrick Cain, quietly and methodically producing strikingly interesting maps of his home city of Toronto.See more about the City of Toronto and other open data initiatives in Canada - Article HERE
See also,
Opendata, Public domain GIS data and Free GIS data repositories and clearinghouses. Are you still paying commercial data resources for Free, public domain GIS data? If so STOP IT and WAKE UP!
Article - How Canada Became an Open data Powerhouse - examples from Toronto