A point cloud also showing the extracted geometry

Incorporating High Definition Surveying in to traditional workflows

Our client initially approached us to provide a “Detail and Level Survey” of a site in Brisbane consisting of a disused church which is about to be redeveloped for residential use.

The initial scope of the survey was quite comprehensive – the typical detail survey items – plus additional items: windows; doors; roof ridge lines and ground levels; including those of adjoining properties.

You can also view the full report “3D Survey Review” in PDF format.

The survey was to be connected to the Map Grid of Australia and also coordinated with the Australian Height Datum.

A couple of things that have come from our past experience and  talking to this client:

  • we knew that the client was interested in comprehensive 3D spatial data, including that from adjoining properties;
  • previous experience with sharing our point clouds has highlighted that clients and their consultants struggle with these files;
  • total stations and traditional civil drafting packages struggle with true building/architectural 3D.

Given the above, we decided to try deploy a hybrid approach to deliver the highest quality and most appropriate spatial data for all stakeholders.

There were 23 scans performed, mostly at the scanner’s medium resolution. Whilst occupying the stations, the scanner was also instructed to take full 360o panoramic photos.

Total data acquired:

  • ~ 14 gigabytes; made up of
  • ~ 250 million points; and
  • ~ 6,000 photographs.

Below are some screen shots to give some idea as to the data now available. Remember .. these are survey accurate points in 3-dimensional space – they can be measured to .. they are not photographs.

If you would like to know more about this type of workflow for your own projects, be sure to get in touch. Call us on +61 7 3239 5444 or e-mail.

Church Point Cloud Elevation

Church Point Cloud Elevation

Church Point Cloud Building Details

Church Point Cloud Building Details

Church Point Cloud Path Details

Church Point Cloud Path Details

Extracted CAD geometry as a traditional topographic plan

Extracted CAD geometry as a traditional topographic plan

Extracted CAD geometry as a traditional topographic plan + aerial photograph

Extracted CAD geometry as a traditional topographic plan + aerial photograph

If you are interest to know, download the full report: 3D Survey Review in PDF format.

Posted in 3D Cloud Modelling, High Definition Surveying, Point Cloud, Surveying.

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