Mainly two types of survey, (i) Geodotic survey (2) Plane survey. The plane survey is further divided into following classification. Based on Nature of the field such as Land survey, Astronomical survey, and Marine survey. Based on Objects of survey such as Aecheological survey, Mine survey, Military survey, Geological survey. based on methods of survey such as Triangulation and Traversing. Based on Instruments used such as Chain survey, compass survey, Plane table, Theodolite survey, Tachometric survey, Photogrametry. arial survey etc.