A wind sensor is not calibrated and reports wind speed values that are much higher than the actual wind speed.

One annotator labels an object as “mobile crane”, while another annotator labels the same type of object as “crane truck". 

A site layout image was collected six months ago, but the access routes and material storage areas have now changed.

A dataset is downloaded from an unknown online source, and there is no information about how the data were collected or labelled.

Some construction site images are missing because the camera stopped recording for two hours.