Measurement Technology and Field Procedures
This domain covers the instruments and procedures that produce boundary evidence. A candidate must understand total stations, GNSS (especially RTK and static), levels, and the sources of error in each: instrument centering, prism constant, atmospheric correction, and the geometry of the observation. For GNSS, know the difference between autonomous, RTK, and static positioning; the role of a base station and a rover; and the fact that RTK accuracy depends on baseline length and satellite geometry. Know how to check a measurement - redundant observations, closure, and comparison to an independent method. Traps: treating a single RTK fix as a boundary-quality measurement without a check; ignoring blunder detection; and confusing precision (repeatability) with accuracy (closeness to truth). Field procedures for boundary work require tying to accepted monuments, checking into the record, and documenting the observation conditions. The surveyor must also know when a measurement is fit for its purpose - a topographic shot and a boundary corner have different standards. Alaska conditions (remote terrain, poor satellite geometry at high latitude, and limited control) make redundancy and independent checks essential.
Rule of thumb: never accept a single measurement as a boundary value - observe redundantly and check against an independent source.
Worked example: an RTK shot gives a corner position, but a check shot from a second base occupation differs by 0.08 ft. The discrepancy exceeds the expected tolerance, so the surveyor re-observes rather than averaging the two.