Deviation analysis

What is the Deviation analysis?[edit | edit source]

This tool supports you in detecting deviations between two point clouds or between point clouds and IFC models.

How to use the Deviation analysis?

Step 1: Target Selection

• Click on the wrench icon to access the deviation analysis tool
• Select one or multiple point clouds you wish to use as reference (choose a primary point cloud, either dedicated or georeferenced, to serve as the anchor for the other point clouds)
• Click “Next” to proceed with Step 2

Step 2: Source Selection

• Choose the point cloud you wish to analyze
• Click “Next” to proceed with Step 3

Step 3: Data Filtering

• Select the desired tool for point selection from the available options
  • None (Rotation)
  • Box Selection; left-click + hold and drag mouse across the screen in desired area
  • Polygon Selection; left-click to select multiple points on point cloud for the desired area – close or finish Polygon by clicking on the first point again
  • Lasso Selection; left-click + hold and drag mouse to enclose the desired area
• Click on the Reset icon in Selected Points Action to revert and undo previous selections
• Click on “Next” to proceed with Step 4

Step 4: Processing

This step may take a few minutes. Once it is finished, a green check mark will appear indicating successful processing.

• Click "Next" to proceed with Step 5

Step 5: Analysis

This section functions as a tool for examine the computed deviation. Green represents 0cm of deviation, while red indicates the highest level of deviation.

• Toggle the wireframe view by clicking on the checkbox next to "Use wireframe view for models"
• Click "Close" to end the tool