What are the uses of 3D laser scanned data in construction?

In the construction business, wherein design and construction professionals have to execute all kinds of simple and complex projects they completely rely on 3D parametric models which  are generated during design development.  The use of 3D parametric Building Information Models came into picture when software developing companies such as Autodesk started to manufacture 3D modeling software specially for supporting architects and engineers. Revit is a 3D modeling software which is intentionally designed by Autodesk for helping design and construction professionals in the development of 3D parametric Building Information Models.

With the highly successful use of Building Information Modeling in construction business, architects and engineers started to utilize the same thing in renovation and retrofit projects. But for developing Building Information Models for renovation projects, design and construction professionals require meticulous information about the building geometry for which they have to scan the building with high end 3D laser scanners. When an existing building is scanned with laser scanners the building information of the existing building is achieved in 3D form. This 3D information is known as point cloud data which is ultimately utilized during point cloud modeling. The existing building is scanned from multiple sides and hence numerous scans are captured for it by professionals responsible for executing 3D laser scanning process. All the scans which are taken from different sides of the building are combined together prior to the release of laser scanned data to an architectural and engineering service providing company. Multiple scans are combined together so that architects and engineers can get a comprehensive picture of the building under question.

Once 3D laser scanned data reaches to a service providing company the first step that is taken by architects and engineers is to convert it into .rcp and .rcs file formats. The 3D point cloud data is converted into .rcp and .rcs files because these files can be easily linked by AEC professionals in Revit when point cloud modeling services are performed.  The information that is contained in .rcp and .rcs files allow architects and engineers to see the entire picture of the building in 3D which is ultimately very crucial for developing 3D architectural, structural and MEP models. These 3D models which are totally parametric in nature are referred by architects and engineers when they finally renovate the building. 

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