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Topographic Survey

Topographic Survey: a survey that measures the elevation of points on a particular piece of land, and presents them as contour lines on a plot. The purpose of a TOPOGRAPHIC SURVEY is to gather survey data using Total Stations, Auto levels, GPS etc., about the natural and man-made features of the land, as well as its elevations. From this information a three- dimension all map may be prepared. You may prepare the topographic map in the office after collecting the field data or prepare it right away in the field using DGPS & Total station.

The work usually consists of the following

  • Establishing horizontal and vertical control that will serve as the framework of the survey.
  • Determining enough horizontal location and elevation of ground points to provide enough data for plotting when the map is prepared
  • Locating natural and man –made features that will be required by the purpose of the survey.
  • Computing distances, angles and elevations.
  • Drawing the topographic map Topographic surveys are commonly identified with horizontal and/or vertical control of third- and lower-order accuracies.