Surveying may be defined as tie method of making measurements of the relative positions of, natural & man-made features on earth’s surface and the presentation of this information either, graphically or numerically.
The commonest methods of presentation are by means of a Plan or Map.
Both Plans and Maps are the graphical representations of the features on a horizontal plane.
Plan is a large scale representation whereas Map is a small scale representation. .
Height information can be added either as spot heights, which are individual heights of points, or as contours which give a less detailed but better visual representation of the area.
Surveying is divided primarily into Geodetic surveying & Plane surveying.