Which term refers to a fixed reference point used to locate features on a map?

• A. Origin
• B. Datum
• C. Bench Mark
• D. Prime Meridian

Answer: (C)

A fixed reference point used to locate features on a map is provided by a benchmark. A benchmark is a physical marker whose precise location (and often elevation) is known, serving as a stable anchor for surveys. By tying measurements to this known point, map makers can accurately place features on the map and verify their positions over time.

In contrast, an origin is the starting point of a coordinate system, a datum is the reference surface or model used to define positions across the whole dataset, and the Prime Meridian is a specific longitudinal line designated as 0 degrees. While those concepts are essential to map coordinates, the hallmark of a benchmark is its role as a concrete, unchanging reference point in the field that ensures measurements and features on a map align to real-world locations.