Good spatial referencing will help ensure that mapping, navigation delimitation of property and other geo-referencing needs all relate to a common spatial reference system.
It is the mandate of the Geodetic Survey Division(GSD) to define the Canadian Spatial Reference System(CSRS) and to provide products and tools that allow easy access it. Accurate positioning (latitude, longitude and heights), once possible only through traditional survey methods and ties to geodetic points in the ground, is now possible using space-based methods.
At the heart of the CSRS is the Canadian Active Control System (CACS); a network of continuously operating GNSS receivers. CACS products and services support positioning accuracies at the decimeter-level (e.g. for imagery geocoding and realtime applications), the centimetre-level (e.g. for legal surveys) and the millimetre-level (e.g. for measuring crustal motion).