Surveyors locate the land parcel boundaries, or property lines, for planning, design, construction, or for the property owners’ general knowledge. Properly locating property lines requires much more than the application of geometry. The first step is the review of the historical deeds and maps which have created the written record of the property lines. Next, the boundary surveyor must find whatever physical evidence exists in the area; usually, this is in the form of survey monuments marking points and lines. These monuments may be iron pipes, wood stakes, or brass tags set in concrete. The final steps are: applying legal principles, mathematical calculations, and if warranted, setting new monuments. Anytime a licensed surveyor sets a new monument, he is professionally obligated to record the survey in the County Surveyor’s office. Without this important step, it is impossible to verify that the survey is correct.