Utility Mapping
Surveys – PAS 128

Safely and securely mapping underground

Centara has an impressive history of providing accurate underground utility mapping surveys. We conduct surveys using precision electromagnetic location (EML) locating equipment and ground penetrating radar (GPR) systems from industry-leading manufacturers, including SPX, GSSI and IDS.

We have some of the most experienced and skilled utility mapping surveyors in the industry, with upwards of 30 years’ experience in GPR, utility location and mapping. Members of the team hold QCF qualifications in utility mapping and are members of The Survey Association and The European GPR Association. Our surveys contain accurate depth and location data for electric cables, water pipes, drainage pipes, telecom cables and ducts. We use high-accuracy Leica and Trimble GPS and total station survey instruments referenced to Ordnance Survey coordinates or your project grid.

All-encompassing solutions

As part of our standard package, we conduct a 100% coverage sweep with GPR and EML locators to ensure uncharted services are located and mapped. We use radiosondes in drainage networks to ascertain accurate line and level data and we record cover and invert levels, record pipe sizes, usage and direction of flow data. GPR data is generally interpreted in mark-out mode; however, we can carry out post-site processing of GPR data if your specification requires. Your final drawings will be presented as an easy-to-interpret CAD drawing (2D or 3D) in PDF format. It will contain detailed explanatory notes. Our standard surveys exceed the accuracies detailed in the BSI PAS 128 standard.

UAV drone surveys, imagery and video

Centara has immense capability in delivering UAV surveys using the DJI Phantom 4 Pro. We are approved by the Civil Aviation Authority and have licensed pilots skilled in undertaking myriad projects with various applications through the design, build and asset management life cycle. Drones are primarily used for low-altitude photography and video capture data sets of very high resolution (HD/4K). A major benefit over satellite or planes is the user’s ability to define revisit times that are unimpeded by cloud cover or cost-prohibitive mobilisation. Our drone surveys are processed in Pix4D using n4ce digital terrain modelling software. They are provided via CAD in point cloud formats with a detailed report outlining the visibility of the surveyed areas and levels of accuracy.

Other services

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Centara is part of the RSK group of companies

The RSK group is a leading integrated environmental, engineering and technical services business offering bespoke end-to-end solutions to a variety of sectors. Headquartered in the UK but with an established presence throughout Europe, Africa, the Middle East, Asia and Australia, RSK helps organisations around the world achieve their business aspirations in a sustainable and efficient manner.