GPR 3D Imaging is a useful tool for getting a picture of what is in the subsurface. Although not often needed in day to day GPR scanning applications it is a useful tool for engineers when more information about the subsurface is required. For getting a better look when coring on rebar is the only option, you can also analyze the area in 3d, and double-check no conduit or PT cable is running parallel. 3D is also available for utility or other grade applications for those who needed the data for geophysical applications.