After having completed various surveys for North Somerset Council to survey areas of interest for design and planning, we were asked to quote on a topographical survey of 0.4km² in the centre of Weston-Super-Mare.

 

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It was specified to achieve a very high degree of accuracy, as the survey was going to be used to redesign roads and the chamber information was vital. We decided to undertake the survey in 1:100 scale to be able to show all the detail required and keep to the accuracy requirements.

This meant utilising out Leica TS16 robotic total stations with fixed poles and special prisms as well as running a solid static network to connect the main control stations to OS national grid. All traverses were processed using string detection and least square methods and resulted in accuracies better than 1:100000. The project took over 20 site days for up to two teams with some areas having to be surveyed at sensitive times due to the large amount of traffic during the day. No traffic management was required, as all data was surveyed while being off the carriageway. Various areas had to be surveyed non-contact, as no agreement with landowners could be reached for access due to time limitations.

Deliverables:

  • 3D cad drawings in several formats for input in AutoCAD and Microstation
  • Survey report including station descriptions for future use
  • Marked up survey stations and BM’s