The height of a tower was determined by trigonometric leveling. The instrument  was set up at point A, a distance of 75m from the base of the tower. The height of instrument set up was measured to be 1.22m. The top of the tower was observed  at an angle of + 35o22’. Calculate the height of tower.

Q: A differential leveling circuit began on BM Hydrant (orthometric height 5869.31 ftft) and closed on…

A: BM Hydrant = 5869.31 ft BM Rock = 5830.03 ft

Q: The upper and lower stadia hair readings on a stadia rod held at station B were observed as 3.50 and…

A: Given:- The upper and lower stadia hair readings on a stadia rod held at station B = 3.50 m and 1.00…

State Plane Coordinate Systems

The state plane coordinate system (SPCS or SPS) is a collection of 124 coordinate systems or geographic zones prepared for particular regions of the U.S. Every state consists of one or more than one state plane zone, the boundaries of which generally follow the county lines. Inside the U.S., there are 110 zones in total, 10 more zones in Alaska, 5 in Hawaii, and 1 for Puerto Rico and US Virgin islands. The system is extensively used for geospatial and geographic data assembling by the state and local governments.