Provided is a survey system () including a rotating laser device () that horizontally emits laser light (LB) at a height (H) from a measurement reference point (RP), a surveying instrument () installed at another measurement reference point (RP), and a las...

Provided is a light transmitter that automatically directs a light transmission port to a surveying instrument. A light transmitter includes a transmitter main body configured to transmit tracking guide light, a drive unit, an inertial measurement unit, an...