202 To determine the distance between two points P and Q and elevation of Q, following observation were made: Height of tacheometer at P = 1.280 m Vertical angle at P = + 4° 25' 20" Staff reading (with staff vertical) = 1.545, 1.905, 2.265 45. 1.00⁰ R.L. of P = 123.265 m. 125.2605 m. lishing th Calculate the unknown parameters after establishing the fundamental relations.

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Instruments for Surveying

Surveying is the practice that determines the relative three-dimensional positions of many different points on the earth’s surface. There are various instruments used in Surveying like Theodolites, Total station, Tripod stands, Plane table, etc. for measuring horizontal angle, vertical and sloping angle, which are very useful for giving accurate and precise measurement.