A topographic survey locates all surface features of a property, and depicts all natural features and elevations. In essence it is a 3-dimensional map of a 3-dimensional property showing all natural and man-made features and improvements.
Soil investigation is to carry out physical testing on site to understand the ground conditions for geotechnical design (foundations, retaining walls & soil improvement). Site works are usually comprising of Standard Penetration Test, [1]Cone Penetration Test[2], Vane Shear Test[3], Installation of Water Standpipe, Instrumentations, … etc. Usually, laboratory testing on soil samples extracted from site works will be carried out to determine the engineering properties of soil.