Trigonometric Levelling & Tacheometry
Tacheometry, Instrument Used In Tacheometry – Tacheometer, Stadia Rod. Different Systems of Tacheometric Measurement- Stadia System (Fixed hair system, Movable hair system), Tangential System, Subtense Bar System, Theory of Tacheometer, Distance and Elevation Through Tacheometer- When a Staff Is Vertical, & When a Staff Is Perpendicular to Line of Sight.
Topics
Compass is a survey instrument used for the measurement of horizontal angles and the bearing of a line of sight.Surveyor Compass and Prismatic Compass are discussed in detailed.
Setting Out Of Circular Curve (Linear Method -Offsets From Long Chord, Angular Method, Etc)
In setting out of circular curve we details discuss offsets from long chord, offset from tangent, offset from chord produced in linear method & tape & theodolite/rankine method / tangential / deflection angles, two theodolite method, tachometer method in angular method.