Which term shall refer to any concrete object that is set permanently in the ground to mark the position of a point or a boundary corner?

• A. Monument
• B. Benchmark
• C. Marker
• D. Pillar

Answer: (A)

In surveying, a permanent concrete object set in the ground to mark a point or boundary corner is called a monument. This term emphasizes durability and a fixed position used as a long‑term reference for boundaries or survey points. A benchmark refers specifically to a point with a known elevation used as vertical control, not just any ground marker. A marker is a general term that can describe temporary or non-durable markers, and a pillar is a type of structure that may be used as a marker but is not the generic term for marking boundary corners. Thus, the best term for a concrete object permanently set to mark a point or boundary corner is monument.