GPR or ground penetrating radar uses radar pulses to image underground objects. It is a non-intrusive and non-destructive method of surveying the subsurface to locate and investigate underground utilities such as cables and piping. Ground penetrating radar can be used to locate objects up to 40 meters underground. Data from ground penetrating radar can be used to create 2D documentation in conjunction with GNSS to create a survey map with the location and depth of the subsurface object. If used in conjunction with 3D laser scanning, ground penetrating data can then be converted into a BIM model to create a comprehensive 3D model of the subsurface objects.