A topographical survey is an accurate depiction of a site (property, area of land, defined boundary) which is scaled and detailed to show all the natural and manmade features and their levels. A topographical survey is highly detailed and requires the involvement of topological professionals to ensure the accuracy of the reports provided.
The soil investigation report is an important legal document that is used as the basis for design of foundations or earth structures as well as their construction. The report also forms the basis for investigating any potential instability or failure of the structure during its life.