SURVEYING SYSTEM AND METHOD OF OPERATING A SURVEYING SYSTEM

A surveying system comprises a base 3, a first alidade 7 mounted on the base and rotatable relative to the base about a first axis 9, a first optical instrument 17 mounted on the first alidade 7, wherein the first optical instrument is configured to emit a first beam 41 of measuring light, a second alidade 19 mounted on the base and rotatable relative to the base about a second axis 21, and a second optical instrument 25 mounted on the second alidade, wherein the second axis substantially coincides with the first axis. The first optical instrument includes a scanner 31, and the second optical instrument includes at least one camera 63.