Theodolite Survey

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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

In contour, we details discuss about use of contour, contour interval, properties of contour lines, ridge & valley line, overhanging cliff, vertical cliff. Etc.

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