The hook
Boundary surveying is forensic work. The deed says one thing, the monument on the ground says another, the neighbor swears the fence has been there for 50 years. Your job is to weigh the evidenceand reach a defensible conclusion. The legal hierarchy of evidence is what tells you which thing wins.
Memorize these
Concepts that show up on the exam
Hierarchy of calls
Order in which conflicting boundary calls are resolved: (1) senior rights, (2) intent of the parties, (3) calls for natural monuments, (4) calls for artificial monuments, (5) calls for adjoiners, (6) calls for courses (bearings), (7) calls for distances, (8) calls for area. Higher beats lower.
Parol evidence
Oral testimony from people with personal knowledge — neighbors, prior owners, surveyors who set the original monuments. Admissible to clarify ambiguity but cannot contradict an unambiguous deed.
Best evidence rule
Where a writing exists, the original is required (or a certified copy). A retracement surveyor needs ORIGINAL deeds, not summaries.
Adverse possession
Open, notorious, exclusive, continuous, and hostile use of another's land for the statutory period (10–20 years depending on state) ripens into title. Specific elements vary by state.
Prescriptive easement
Same elements as adverse possession but creates a USE RIGHT (e.g., access, utility) rather than transferring title. Common for old farm roads across neighboring parcels.
Acquiescence
Where adjoining owners have treated a particular line (often a fence) as the boundary for many years, courts may recognize that line over a conflicting deed line. State-specific.
Controlling element
The single highest-ranked call that can be reliably located. If the deed calls for a specific monument and you find it, the monument controls — even if it's 5 ft from where the bearing/distance puts it.
| Evidence type | Example | Weight in court |
|---|---|---|
| Original natural monument | A specific named river, ancient oak | Highest — assumed permanent and certain |
| Original artificial monument | Iron pin set by the original surveyor | Very high — physical evidence intended to mark the corner |
| Calls for adjoiners | "to Smith's line", fence in long use | High when consistent with possession |
| Bearings and distances | "N 45° E, 200 ft" | Lower — assumed to be measurement-error-prone |
| Area | "containing 5 acres more or less" | Lowest — only used to break a tie |
| Parol testimony | Neighbor: "the corner was always under that bush" | Admissible to clarify ambiguity, not to contradict clear writing |
Try it before you peek
Worked example
The problem
A deed describes the eastern boundary as "thence N 30° 00' E, 200 feet to an iron pin set in the ground; thence to the line of Smith." You find an iron pin clearly identifiable as the original (rusted, period-correct, witnessed by a fence corner) at N 30° 15' E, 198 feet from the start. The deed bearing/distance disagrees with the monument by 15' and 2 ft. Which controls?
Don't fall for these
What trips people up
Treating coordinates as evidence
Coordinates are NOT in the hierarchy. They're a derived value computed from one of the listed evidence types. A "coordinate from the records" carries the rank of whatever evidence the original surveyor used to set it.
Calling parol evidence inadmissible
Parol can't contradict an unambiguous deed, but it CAN clarify an ambiguity. If the deed says "to the iron pin near the big oak" and there are two big oaks, parol testimony about which one the original surveyor meant is admissible.
Letting weak evidence win because it's recent
A 2024 GPS-set monument doesn't outrank the 1880 original iron pin even if the GPS is more precise. Senior rights win, and original-survey monuments are senior.
Test yourself
How well did it stick?
A quick 5-question check on Principles of Evidence. See where you stand and what to review.