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SUBJECT
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.
Bearing measured from one station to adjacent next station in the direction of traverse is called fore bearing. Back Bearing, Magnetic Declination, Angle of Dip are discussed in detailed.
In compass surveying each control point is established with the help of linear and angular measurements and this process is termed as traversing. Traverse, Meridian, Bearing are discussed in detailed.
In equipment used in chain surveying,we details discuss about surveying chain, types of chain- revenue chain, gunter’s chain, engineer’s chain, metric chain, suitability of chain, unsuitability of chain, units of measurement, tapes-cloth or linen tape, metallic tape, steel tape, invar tape, pegs, arrows, ranging rods, offset rods, plumb bob, clinometer, cross-staff, optical square, prism square, chain survey instruments, distance measuring device, instruments used for various types of measurement