Property line escribes the legal boundary of a parcel of land. The boundary is established by a professional surveyor using a transit and modern Global Positioning System (GPS) technology. The coordinates of the property line are often described on a drawing called a "plot plan" or "plat" by indicating the length of the boundary along a specific compass bearing in relation to a verifiable "point of beginning". The metes and bounds method is also used to provide a legal description of a property.