Laser Survey and LOD 300 Model Case Study – Goodmayes Hospital

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Chartered Surveyor Luke Wale introduces this large laser survey project of Goodmayes Hospital at Romford in North London

This major project involved a measured building survey of the 10 hospital buildings and 20 ancillary buildings on this 25 acre site. Our client, architects practice Ingleton Wood, required detailed scans of the external facades and for the survey data to be delivered as a 3d model.

The 3D model was created to various levels of development relating to how the data was going to be used. This included a LOD 300 model of the external elevations of the buildings in detail which were going to be preserved, but only the structural internal elements of the building as these were going to be remodelled. We also picked up the ancillary buildings to a conceptual level to give context to the site.

The scale of the project can be understood by the external traverse of the site which was 1,000 metres.

We used laser scanners to capture the details on the external elevations and within the vacant buildings; and used traditional measured surveys for the buildings that were still in use.

We took over 600 laser scans in total, amounting to over half a terabyte (500 gigabytes) and the biggest challenge was managing the data, registering the scans to bring it altogether.

Our comprehensive survey department has specialists in different areas including experienced site surveyors, expert 3D modellers and specialists in laser scanning and setting up control networks.

The key to this project was how we linked the different sources of data including GPS, Total Station, laser scanning and manual hand measurements.

If you’d like to discover more about the full range of Survey Services offered by C A Design Services, please contact Mark Johnson or Iain Tubby on 01493 412806 or email