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Help > Troubleshooting > Project Review Pane > Photo Status Items > Photo Status: Mean number of references
Photo Status: Mean number of references

If the Photo Status Items report a low mean number of references it means the average number of references per point on a photo is below the threshold listed on Project Review Settings Dialog.

If a point is only referenced on a few photos there is less mathematical redundancy and if the average number of references per point on a photo is low it means there is less data (e.g. points) available to solve the camera’s position accurately.  Add references to other photos.