Boundary Surveys are undertaken to determine the location of property lines and the actual physical extent of property ownership, typically witnessed by monuments or markers. The surveyor performs courthouse research to obtain deeds for the subject and adjoining properties which represent ownership, easements and other interests. The surveyor then performs fieldwork to locate property monuments such as iron pins, blazes in trees, piled stone corners or other types of monuments. The surveyor also notes encroachments and other occupations of the property which may affect ownership. A map or plat, which represents the completed survey, is then drawn from the data showing all property lines, dimensions and measurements.