Ground Penetrating Radar is particularly adept at not only mapping buried structures but approximating the depth to their top, providing an all important extra level of detail.
GPR works by pulsing electro magnetic waves into the ground and measuring the strength and time delay of the returning signal, therefore allowing it to approximate the depth as well as the density of the buried horizon. As well as in green field sites GPR can also be used in urban environments where other techniques may be unsuitable.
Features commonly identified by GPR:
- Foundations
- Ditches - Pits
- Mines – Shafts – Voids
- Services – Pipes – Cables – Culverts
- Bedrock – Water table