Plane Table Surveying Instruments

Plane table surveying is a type of  surveying  which can be done very fast. The necessary equipment of the plane table survey is mentioned below. Also, brief discussion and photographs of major instruments are given below. General Plane Table Survey Equipment Some basic surveying instruments are required for  plane table surveying . Followings are the general plane table survey equipment. Plane table Alidade for sighting (telescopic or simple) Plumb bob and plumb fork Compass Spirit level Chain Ranging rods Tripod Drawing sheet and drawing tools Paper clips or screws Details of Major Plane Table Survey Equipment Simple Alidade Alidade compass has two edges. One straight and other one is beveled. The straight edge is made of brass or gunmetal and works as a ruler. The beveled edge is called the fiducial edge. It consists of two vanes at the ends. The vanes are hinged and can be folded when the alidade is not in use. One of the vanes is t...