"Specialising in measured building, land & topographical surveys"

GPRS Utility Surveyors London and Utility Mapping Surveys Surrey. Buried Utility Surveyors. Utility Detection Surveys London and South UK.


Cadmap Limited produce top PAS128 Specification GPRS surveys for a variety of clients, from home owners to blue chip clients.


A GPRS survey (Ground Penetrating Radar Survey) is a non-invasive technique used to detect and map underground features such as pipes, cables, voids, and other buried infrastructure. Ground Penetrating Radar (GPR) uses radar pulses to generate images of the subsurface, making it a valuable tool in industries like construction, utilities, archaeology, and drainage surveying.

How GPRS Surveys Work:

GPR equipment emits electromagnetic waves into the ground. When these waves encounter underground objects or materials with different electrical properties (such as pipes, cables, or voids), they reflect back to the surface, where they are captured by the radar. The data is then processed to create images or 3D maps of the underground structures.

Applications of GPRS Surveys:

  1. Utility Mapping: To locate buried pipes, cables, and other utilities without digging.
  2. Drainage and Sewer Surveys: Identifies the location and condition of drainage systems and sewer lines.
  3. Construction Planning: Ensures safe excavation by identifying underground hazards before starting a project.
  4. Archaeology: Used to detect and map historical artifacts or structures buried underground.
  5. Environmental Studies: Locates voids, contaminants, or groundwater levels.

Benefits of GPRS Surveys:

  • Non-invasive: No need for excavation, which minimizes disruption.
  • Accurate: Provides precise data on the location and depth of underground objects.
  • Time-efficient: Rapid data collection compared to traditional digging methods.

In summary, GPRS surveys are widely used for safely detecting underground infrastructure, aiding in planning, maintenance, and development projects.


Leica DS2000 Radar Imagery on a GPRS site in London.