Boundary Surveying and Retracement
What this domain tests
Boundary retracement questions ask whether you can follow in the footsteps of the original surveyor: identifying the original boundary evidence, ranking conflicting calls, and correctly deciding what your survey must hold. New Mexico adds land-grant and long-standing occupation evidence, so expect questions where the deed geometry and the ground disagree.
Core rules
- The hierarchy of evidence generally runs: natural monuments, then artificial monuments, then courses and distances, then area. Calls for adjoiners often rank with monuments.
- A retracement survey does not create a new boundary; it locates the existing one. The original survey, not the most recent one, controls.
- Deeds are construed as a whole; specific calls beat general calls, and a call to a monument prevails over a recited distance that conflicts with it.
- Unwritten rights (agreement, acquiescence, estoppel, adverse possession) can move a boundary away from the deed line, and your plat should disclose the occupation line you found.
Worked example
A deed reads "thence N 00°00' E, 500.00 ft to an iron pin." You recover an original 5/8-inch rebar with a surveyor's cap at 496.32 ft, consistent in age with the deed, and the computed 500.00 ft position falls in a paved driveway. Reasoning: the monument is called for and is original, so it controls over the distance. Hold the pin, and note the 3.68 ft record/measured discrepancy and the basis for your holding on the plat and in the description. Do not average the two positions.
Traps that cost marks
- Proportioning a line between monuments when both monuments exist.
- Treating a found monument as original without checking record, age, and position tolerance.
- Using area to redefine lines; area is the weakest call.
- Assuming a deed bearing is geodetic when it was probably referenced to a magnetic meridian of its era.
- Ignoring visible occupation because the math closes.