Represents a short summary of the land's description (known as the "legal description"). In addition to street addresses, Ontario properties are identified with a numbering and identification system that dates back to the time of the first land settlers. Originally, land was divided into lots, concessions, townships and subsequently into subdivision plans, condominium plans with into Towns/Cities/Regions in order to describe each and every property by its physical geographic location. These legal descriptions remain in use by municipal and provincial governmental authorities for tax assessments and land transactions recorded in the land registry offices.
Source
https://www.krcmar.ca