Tips for cloud to cloud scanning workflows

Before you begin:

  • Draw up a plan of your project so that you can hit the ground running in the field.
    Consider using https://www.tls.tools/PlanScan/
  • Document each scan location (photos, notes etc)
  • Go through the site opening all doors and moving any items that might cast “shadows” before scanning

Example Scan Plan

Scan Plan

Scan Position Scan Position
Links Links/Constraints
Target Target Position

 

Scanning

  • Try to keep the scanner at the same elevation for the whole set and keep the unit as level as possible
  • Choose your scan positions with the best chance of overlap with as many of the subsequent scans as possible, try to close loops where you can
  • If moving between rooms, make sure to take a scan in the doorway. You should aim to achieve a 30% overlap or more between scans
  • As you move from room to room try to ensure that each new scan shares a corner with a previous one. Don’t move too far through the threshold
  • Try to maintain a clear line of site between scan locations
  • Each time you change level or have a natural break in the site try to create a new bundle, this will help to organise your data later
  • When scanning exteriors, consider how features around the subject might be useful in registration
  • Troublesome areas (long hallways or repetitive spaces) can be harder to register than others. Consider the use of targets to aid in these areas – create custom targets here: https://tlstarget.com/index.html

placing scans-1Placing Your Scans

Several factors affect how far you should move between setups:

  • Scan density
  • Scanner range
  • Level of detail required
  • Environment