SEQUENCE OF WORK

STEP 1:

Site visit and collection of spatial data using a tripod mounted laser scanner

STEP 2:

The 3D spatial data was registered with geotechnical computer software which produced a point cloud. The point cloud was indexed for use within standard CAD packages.

STEP 3:

Prepare computer model in CAD. Extract 2D elevations and plans as required by client.

Delivery of information and drawings to client

STEP 4:

Analysis and simulation.

Planning issues:

Overlooking and rights to light

Shadow analysis-

Other services and benefits of laser scanning-

Laser Scanning and Modelling of the site of new hospital site, UK.

Background:

A collaboration with Advanced Simulation Technologies Ltd.

Construction of 3D Computer Model from point cloud

A transparent hole was cut through an image of an OS map and placed within the CAD model. The below ground levels of the building were then visible through the 2D street map and the positions of the model were derived from point cloud data.

Deliverables:

Computer models were generated and 2D plans and elevations produced in the usual formats. The models contain accurate dimensional information and may contain other building information as required by the client.

Building Information Modelling:

A client may request that the model is produced in "Revit" which allows for meta data to be assigned to the building components. Information such as building specifications, products, volumes and position provide an interactive 3D database for use by the building owners and future designers.

Once a model has been created using accurate spatial data the computer simulations and graphical visualisations that can be produced are wide ranging.

Virtual cameras where placed just inside apartment windows and an accurate views across the site and adjacent buildings are simulated.

These views can be used when incorporating new building designs into the existing model and the impact on the existing environment can be accurately predicted.

The accuracy of point cloud data is of particular use when determining planning and right to light matters

Sun/shadow analysis is precise when point cloud data and GPS coordinates are placed within computer software to accurately plot the suns path.

Monitoring structures and spatial information:

Another benefit of using laser data from the outset is that the existing environment is recorded. A site may be revisited at another time and observations may be made as to the subsequent spatial positioning of areas measuring as little as one millimeter.