Land Surveying Boundary retracement is not finding and trying to correct mathematical errors in previous surveys. The rules of construction and boundary court cases,Insist that the Land Surveyor shall in his or her retracement work follow in foot steps of the original Land Surveyor to the best of their ability. Called for Natural monuments (trees,streams,roads,ridge lines etc Called for new monuments set by the original Land Surveyor (iron pins,iron pipes,conc. markers etc) Original Monuments natural or man made set or located by the original Land Surveyor control over any bearing or distance Bearings over distances (Control in Original 13 colony states or states from the Original Colony states Distances over bearings in Public Land States (all states not of the original colony states