Tag: Surveying

Levelling is known as the Elevation measurements involve measurements in vertical plane. It may be defined as the art of determining the elevations of given points above or below a datum line or establishing given points of required heights above or below the datum line. TERMS USED IN LEVELLING Before......

Compass is an instrument which can be used to measure the direction of a survey line with respect to magnetic north-south. The magnetic north-south direction which is the reference direction is called meridian (reference direction) and the angle between the line and the meridian is called bearing. Use of compass......

The most commonly used plane table It consists of a well-seasoned wooden table Top mounted on a tripod. The table top can rotate about vertical axis freely. Whenever necessary table can be clamped in the desired orientation. The table can be levelled by adjusting tripod legs. ACCESSORIES OF A PLANE......

Measurement of distances using chain or tape is termed as chaining. This is the accurate and commonly employed method in surveying: These instruments can be classified as [1] chains [2] Steel band [3] Tapes   [1] CHAINS The chains are composed of 100 pieces of 4 mm diameter galvanised mild......