The cadastre shows a property on a plan and identifies it by a lot number. This plan indicates the dimensions, area, shape and position of this property in relation to other lots in the vicinity.
The cadastre used in Québec is a state register composed of several plans and documents prepared by land surveyors. This register is used to publicize property titles at the Registry Office, therefore protecting ownership rights. It is also used in property assessments and in boundary determination.
The government of Quebec is currently registering all public and private properties located in Quebec. The cadastral renewal project is expected to last a few more years and will assign a unique lot number to all properties.
Source: Ressources naturelles et Faune website