Issue description
Processing for a specific Dataset has completed but the warning message One control point is misaligned is displayed.
Possible cause for this is one control point does not match the scanned data and/or other control points. There may be several reasons for this:
The control point was not measured correctly with the total station (offset in low cm range).
When using control point stickers, a sticker may have been misplaced before scanning.
The device slipped while scanning this control point.
There is a typo in the control point location in the anchor file.
A SLAM break occurred during the scanning.
Troubleshooting procedure
Click View Control Point Configuration to check the corresponding control point.
Click on the quality map and check for extensive drifts or SLAM breaks. You can identify SLAM breaks through double walls, shortened or extended walls/corridors, unnaturally tilted rooms or a jump in the trajectory.
If there is no obvious SLAM break, correct or exclude (refer here for more details) the misaligned control point and rerun processing.
In case of a SLAM break, contact NavVis support and attach the following data to help us investigate the problem:
The quality map: right-click on the quality map and click Save image as.
The processing logs.
The control point optimization logs.
FAQ
What does the warning message 'One control point is misaligned' indicate?
It indicates that one control point does not match the scanned data or other control points.
What are some possible causes for a misaligned control point?
Possible causes include incorrect measurement with the total station, misplaced control point stickers, device slippage during scanning, typos in the control point location, or a SLAM break.
How can I check the control point configuration?
You can check the control point configuration by clicking on 'View Control Point Configuration'.
What should I look for in the quality map to identify issues?
Look for extensive drifts or SLAM breaks, which can be identified by double walls, shortened or extended walls/corridors, unnaturally tilted rooms, or jumps in the trajectory.
What should I do if I find a misaligned control point?
You should correct or exclude the misaligned control point and then rerun the processing.
What steps should I take if there is a SLAM break?
Contact NavVis support and attach the quality map, processing logs, and control point optimization logs to help investigate the problem.