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Scan to BIM or Point Cloud to BIM is the most accurate method to create As-Built BIM Models of any existing Buildings or Interior spaces. Not all Laser Scans are equal. A lot of times there are Blind Spots or missing data. Incomplete low-quality, low-density Black & White can be very difficult to Model accurately and can sometimes take a long time to model as the modeler needs to decipher and interpret missing or low-resolution Point Cloud Data. This article describes best practices you should follow to would help you get the best results.

Scan to BIM Process

let us first understand the Process. Scan to BIM is essentially composed to three stages:

  • Scanning

  • Registration

  • Modeling

Scanning

  1. Define Scope of Work and level of Detail.
  • It is critical that the scope of Work is clearly and precisely defined for the Project.
  1. Define the Scanning Process and methodology
  • Define methodology to be adopted before sending in field staff.
    Plan your Scanning Process
  • Identify Camera Positions and ensure Circles of each Camera overlap.
  • Support Point Cloud Data with Photographs and 360 Walkthroughs.This helps modelers understand space and elements that are unclear in Point Cloud.
  • Field Notes can help in accuracy. Not all information is clear in Scan data, Field Notes take a higher priority over Point Cloud and result in a more accurate BIM Model.
  1. Registration
  • Each Project will have multiple scans in order to scan a Building or an Interior space. Autodesk Recap Pro can take this raw data and automatically register the raw data. Number the scans sequentially. Number raw scans sequentially. This helps in aligning scans properly.