A home's boundary is defined as the border between two adjacent properties. It is the spot where one individual's yard ends and another begins. Boundaries are not always clear cut. Sometimes the local government will become involved if there is a boundary dispute and attempt to more clearly define the boundaries of the two properties. Sometimes a boundary is literal: a homeowner may construct a fence or a wall to clearly distinguish where there property ends and the next door neighbor's begins. But most of the time, a boundary is a legal vehicle used to assess the home and not a physical entity. Boundaries are often established by professional surveyors who use GPS systems to accurately identify the exact location of the boundary between two properties. These GPS coordinates are often used to specify the size of a specific plot of land.