Angles, Bearings & Distances

Worked: a total station shot

A total station reads a slope distance of 425.60 ft at a zenith angle of 86°30′. The vertical angle is 90° − 86°30′ = 3°30′. H = 425.60 × cos 3.5° = 424.81 ft, and the target is 425.60 × sin 3.5° = 25.98 ft above the instrument’s line of sight.