Dimensional control surveying is the technique of accurately obtaining measurements of an object in a 3-dimensional space and digitally re-creating it with precisely mapped measurements. These objects can then be analysed against their original design to easily identify inaccuracies.

Ground Penetrating Radar Surveying (GPRS)
Ground Penetrating Radar Surveying (GPRS) is a non-invasive way to detect surface and subsurface elements. This versatile method uses electromagnetic pulses to identify void spaces,