Field Measurement, Monumentation, and Survey Procedures
Measurement fundamentals
Distinguish accuracy from precision. Random errors average out; systematic errors (prism constant, atmospheric correction, scale, instrument calibration) bias every shot; blunders are gross mistakes to be found and eliminated. Traverses are adjusted by compass rule or least squares, and closure is reported honestly rather than forced.
Field procedures
Establish control, occupy and backsight, and take independent check shots. Tie every monument you set or hold to at least two record monuments. GNSS static or RTK work supplements but does not replace ground evidence; coordinates are not evidence of a boundary. Leveling and vertical control follow the same check-measure logic.
Monumentation
Use the material and cap required by local practice and statute: rebar with a licensed surveyor's cap, pipe, or other accepted marker, set at the resolved position. Record ties, witness corners, and corner records. Long-standing corners deserve perpetuation, and removal generally requires notification to the governing authority.
Traps in questions
Confusing precision with accuracy; reporting a coordinate as a boundary; setting monuments before the boundary is resolved; failing to check a backsight; ignoring temperature, prism, or scale corrections; removing a monument without notice.
Rule of thumb
Measure every controlling distance twice from independent setups, and treat any shot you cannot check as unverified. Set nothing until the evidence hierarchy supports the location.