Surveying

Surveying means measuring an area

Surveying means measuring an area to prepare maps. It includes both linear and angular measurements and gives the relative positions of points on the

Survey can be classified on

Survey can be classified on the basis of accuracy, purpose, and instruments used. Based on accuracy, triangulation is very accurate and traversing is

Plane table survey is based on

Plane table survey is based on the plane table instrument. Its greatest advantage is that field work and plotting are done simultaneously in the field

The plane table is a drawing

The plane table is a drawing board of well-seasoned pinewood fitted on a 1.5 metre tripod stand. It is the main instrument in plane table survey.

The alidade is a flat ruler

The alidade is a flat ruler about 40 to 50 cm long, made of wood or metal. It has an eye vane with three eye holes and a sight vane with a vertical th