The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather, anywhere on or near the earth where there is an unobstructed line of sight to four or more GPS satellites. It is maintained by the United States government and is freely accessible to anyone with a GPS receiver.

GPS is used by MTC in one of its primary roles of finding the boundary of a person’s property and describing it in legal terms, thus creating legal documents so the property owner possesses a legal description of what land he owns.