Alignment Errors & Misalignments

What is alignment?

Every Matterport Space is a set of scans. Each scan is a set of 2D and 3D data from one physical position. 3D data from all the scans are combined to create a complete 3D Space.

The first scan is a single point in space. Every scan after that is aligned to a previous scan. A properly aligned scan means it is in the same position in software as in real life.

Generally, the Matterport Capture app aligns by overlapping the 2D and 3D data and searching for areas of high similarity. No GPS data is used for alignment.

 

Issues

If there is no overlapping 3D data, this is an alignment error.

If there is "too much" overlap or incorrect overlap because the space is very uniform, this is a misalignment.

To recover from both problems the general advice is to:


Alignment Errors

An alignment error is when the Matterport Capture app cannot align the current scan to your previous scans. In this case, Matterport Capture will immediately tell you something is wrong.

To recover from an alignment error, reduce the distance from a previously completed scan by half and try again.

If this doesn’t work, delete the previously completed scan and scan over that spot again. Repeat this process of deleting and rescanning until you have recovered alignment.

 

Misalignments

A misalignment is when the Matterport Capture app thinks it aligned the scan, but it actually placed the scan in the wrong spot.

For example, scan 7 was placed between scan 5 and scan 6 in the app. However, in real life scan 7 was where the orange circle is. Scan 7 was a misalignment.

Misalignments can cause problems when the model is processed. Misalignments can also stack on each other. Too many misalignments can make it unusable.

Check the iPad after every scan to make sure the scan is in the correct place (location on iPad matches location in real life). You may have to zoom in to find the most recent scan.

Misalignments can be easy to miss if you have been scanning for several hours.

To recover from a misalignment, first delete the misaligned scan. Then half the distance to the previous scan and try again. If this was successful, continue at the normal distance.

If this doesn't work, delete the two previous scans and scan again over the last scan position. So if scan 25 results in a misalignment, then delete scans 25 and 24 and scan again over scan position 23.

Continue at a slower pace (half the normal distance) or lower the tripod until you regain alignment. Remember to hide extra scans in Workshop later. Learn more.

If you are scanning a large empty property like a warehouse, read our special Scanning Large Empty Spaces guide.

 

Misalignment Examples

Floorplan View


Misaligned Space

Correctly Aligned Space

Dollhouse View

Misaligned Space Correctly Aligned Space
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