Contour Survey

If you are considering property developing, contour surveys should become your new best friend. It is important to understand the contours of land. I find that many of our clients do not understand what a contour survey is and why it’s necessary, so here goes.

In the property world, a contour is an outline of a mass of land. A contour or detailed survey is done by a surveyor and required before you can start on the design of your buildings. Contour lines will be marked on the survey.  Below are some tips* that can help explain the marking you’ll see:

  • All points on a contour line are of the same elevation.
  • No two contour lines can meet or cross each other except in the rare case of an overhanging vertical cliff or wall
  • Closely spaced contour lines indicate steep slope
  • Widely spaced contour lines indicate gentle slope
  • Equally spaced contour lines indicate uniform slope
  • Closed contour lines with higher elevation towards the centre indicate hills
  • Closed contour lines with reducing levels towards the centre indicate pond or other depression.
  • All contour lines must close either within the map boundary or outside.