A plan which shows vertical elevations or contours, as well as physical details above, on and below the ground.
Topographic surveys are plans that show the physical properties of a site. These plans may be used by Engineers and Planners to assist with the design of a development proposal, but are not the plans used for the development application. A topographic survey may complement a development application. It shows the physical constraints that the proponent must consider in a development application, or a detailed design of a site for development purposes.
The surveyor often provides the topographic plan, which shows vertical elevations or contours, as well as physical details above, on and below the ground. Contours are lines on the drawing that join points that have the same elevation on the ground. Contour lines never cross each other, and the closer the lines are to each other, the steeper the slope. Conversely, the further apart the lines are from each other, the flatter the slope.
Reference: Information obtained from AOLS website – www.aols.org