Which term refers to the instruments used in traverse, triangulation, and trilateration and other terrestrial-based surveying methods?

Which term refers to the instruments used in traverse, triangulation, and trilateration and other terrestrial-based surveying methods?

• A. Aerial photogrammetric instruments
• B. Conventional surveying instruments
• C. GNSS receivers
• D. Total stations

Answer: (B)

The key idea is ground-based measuring tools. In traverse, triangulation, and trilateration, surveyors work directly on the ground with traditional instruments that measure angles and distances using physical setups—tape, levels, theodolites, compasses, and similar devices. These are referred to as conventional surveying instruments. They contrast with methods that rely on air or space, such as aerial photogrammetry (which uses aircraft imagery) or GNSS (which uses satellites for positioning). Total stations fit into this category as modern ground-based tools that still operate in the conventional tradition, combining a theodolite and electronic distance measurement for terrestrial surveys.