Measurement Accuracy

Cupix SiteView offers users the option of making measurements using 360° photos from a digital twin.  As explained in How 3D Measurement Works, both methods of making measurements do not use point clouds or mesh data to spatially determine the location of the start and endpoints of the dimension.  These measurements will have a degree of accuracy dependent on the photos used to make the measurement.

Levels of Accuracy

There are three different levels of accuracy that a measurement can have.

Level 1

The accuracy of the measurement is indeterminate. This means the measurement error cannot be defined because 3D mapping accuracy of 360° photos cannot be assessed. We do not recommend using Level 1 measurements for applications requiring a high degree of accuracy.

Note: If a manually positioned 360° photos is used during point selection, the resulting measurement will have Level 1 accuracy. This is because the position of the 360° photo is not carefully processed or aligned using the Cupix algorithm, and therefore the accuracy of this measurement is unknown.

Level 2

Measurement has an error of plus or minus 5% (with 67% confidence). A measurement is defined as having a Level 2 Accuracy when it is made using 360° photos from two separate clusters or captures.

Level 3

Measurement has an error of plus or minus 1% (with 67% confidence). A measurement is defined as having a Level 3 Accuracy when it is made using 360° photos that are in the same auto-positioned cluster.

Note: Measurement accuracy Level 2 and 3 will only be displayed if a digital twin has ‘Measurement Ready’ enabled.


Note: While the SiteView measurement tool is used to help make reasonably close estimates, proper digital twin scaling, cluster positioning, and capture techniques are all necessary for accurate measurements. For truly error-sensitive applications, please verify all measurements with real-world values.

3D Models and Accuracy

To compare BIM and digital twins side by side, always verify with the owner of the SiteView that the BIM and as-built digital twins are scaled in the same manner using the same origin points.

When a digital twin does not have Measurement Ready enabled, you will receive the following message when clicking on a 3D object in your BIM:

  • ‘Objects may not appear at the correct positions when the pano alignment is uncalibrated.’

For Admins: Accuracy and Capture Mode

The accuracy of each measurement can be dependent on the capture mode that was used to create the digital twin. If a certain degree of accuracy is required from digital twin measurements, speak to your team member who is in charge of making captures at the job site about which capture mode you need them to use.

Single Shot Mode

Range of Accuracy:

  • Level 1


The location of the 360° photo taken in single-shot mode is positioned on the reference plan by the user, and these photos are not re-positioned relative to other captured areas by the Cupix algorithm. Because the capture is composed of just one 360° photo, measurements made with panos taken in single-shot mode will have Level 1 Accuracy.

Multi-Shot Mode

Range of Accuracy:

  • Level 2 - Level 3

Aside from the location of the initial pano, 360° photos taken within one multi-shot capture are positioned relative to each other by the Cupix algorithm. Further scaling using on-site measurement(s) is needed in order to be able to make accurate measurements in the digital twin. Because many of the 360° photos in multi-shot mode are carefully positioned by the Cupix algorithm, measurements made using these panos will typically have a Level 2 or Level 3 Accuracy.

Video Mode

Range of Accuracy:

  • Level 2 - Level 3


360° photos pulled from frames taken with video capture are positioned relative to each other by the Cupix algorithm. Further scaling using on-site measurement(s) is needed in order to be able to make accurate measurements in the digital twin. Because many of the 360° photos from video mode are carefully positioned by the Cupix algorithm, measurements made using these panos will typically have a Level 2 or Level 3 Accuracy.

Note: When submitting a video capture to CupixWorks for processing, select Speed Priority instead of Accuracy Priority to create digital twins with more accurate measurements. Speed Priority is used to generate a viewable digital twin of your job site within an hour - depending on the size of the capture, one hour is not enough to position photos for high accuracy (down to 1% error or Level 3 Accuracy) measurements.