Optical Tracking Error Margins (KB-TT005)
Without an external GNSS/RTK device, vGIS AR initially relies on the calibration for the positioning and then on the optical tracking while moving around. While optical tracking provides the stability and accuracy suitable for most field deployments, it also has a 1–4% margin of error in normal light and 3–8% in low-light conditions1. This means for every 10m travelled, the system may miscalculate the travel distance by as much as 0.4m in normal light or up to 0.8m under extreme circumstances.
Understanding this margin of error and the ways to minimize it will optimize your experience.
Note: In over 95% of cases1, the error applies only to objects away from the starting point. Typically, the starting point remains locked in the same physical position regardless of the distance travelled, even if the distance to the endpoint has been miscalculated and the endpoint appears closer or farther than it is.
Fig. 1
1Study conducted by Meemim Inc. from November 2017 to March 2018 to measure the distance-tracking margin of error by HoloKit, ArKit and ArCore. All rights reserved.