Scan vs. BIM

Using the Comparison Tool

• In the Project Explorer on the left, select the project at the root or the Work Zone that contains the data sets that you want to compare. Your selections in the Comparison Tool will be limited to the Work Zone and sub-Work Zones selected in the Project Explorer.
• Click on the ‘Comparison tools’.
• In ‘Selection’, select:
• The set of scans (or ‘All Scans’) that you want ‘To Compare’ to a reference.
• And the set of scans or the BIM model (or ‘All Moels) that will be used as ‘Reference’.
  

Using the Comparison Tool – Visual Difference Tool

• With the Visual Diff too, a heat map will be generated that highlights the difference between your data sets (either Scan / BIM, BIM / Scan or Scan / Scan).
• The default view is bi-color.
  

• You can select either the metric or the imperial system.
  

• You can then adjust the tolerance by using the slider or by typing a value.
  

• You can change to display setting to a gradient one by selecting ‘soft’.
  

• The Visual Diff Tool will colorize either the mesh or the BIM model/ scan data based on which information is in front, superimposed, or behind the other one, in the viewer’s line of sight. In this example of scan vs. BIM, the scan data is colorized.
  • Everything red is in front of the BIM model at the distance higher than the one given in the ‘distance adjustment’.
  • Everything green means that the scan data and the BIM model are within the range of the ‘distance adjustment’.
  • Everything blue is behind the BIM model at a distance higher than the ‘distance adjustment’ value.

Using the Comparison Tool – Visual Check Tool

• With the Visual Check tool, you have the flexibity to select the display mode for your scans between 3D RGB and 3D Surface.
  

• With the Visual Check tool, you use the transparency slider to compare your data sets.