Chambers Defect and Geometric Survey by Laser Scanner

Purpose of survey

A chambers defect and geometric survey shall be carried out to determine the inventory, condition, detailed defects and internal geometry of chambers, including the use of a laser scanner with inbuilt panoramic still camera(s) and a closed-circuit television (CCTV) camera

What is a Chamber Defect and geometric survey by laser scanner?

  • a field survey carried out where full and detailed knowledge of the condition and defects of chambers is needed;
  • a field survey carried out where continuous measurement of the internal geometry of the chamber is required;

Benefits of using CleverScan

  • DDC CleverScan manhole scanner can provide chamber inspections with the press of a button, CleverScan performs a rapid, high-res, fully automated chamber inspection. You get a flat image scan that captures detail from every inch of the chamber wall, plus a dense point cloud that can be easily merged into any CAD or 3D application.
  • CleverScan’s compact, lightweight design travels anywhere and deploys in minutes.
  • Fully compatible with ArcGIS, WinCan and MACP

Survey data round tripping

As with all NH DDMS surveys, they are driven by consistently delivering to the high standards set out in CS551. Survey data round tripping is a vital function to achieving the high data quality outcome necessary to build a catalogue of ‘reliable, intelligent data’.

All of our surveys are compliant to National Highways documents CS551 and CD535.


  • Coded survey data in the digital format compliant with CD535
  • Video recordings referenced in the coded survey data
  • Photographs of selected features referenced in the coded survey data
  • Unwrapped panoramic photograph of the walls of each chamber
  • CAD drawing files
  • A summary report in PDF format


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