Method of calibrating a total station using a GNSS device

A method of calibrating a total station using a GNSS device, said total station including a camera that is adjustable along horizontal and vertical axes with the angles being measured by encoders, wherein said GNSS device includes a communication antenna for receiving position data from a plurality of satellites, said method comprising:

• determining a position of the total station at a first location based on position data received by the GNSS device that is physically coupled to the total station;
• decoupling the total station from the GNSS device;
• moving the GNSS device to a second location while leaving the total station at the first location;
• determining the position of the GNSS device at the second location based on position data received by the GNSS device;
• adjusting the position of the camera on the total station to image the GNSS device while at the second location;
• determining the axes of the camera based on the orientation of the camera and the determined positions at the first and second locations;
• and
• calibrating the encoders of the total station based on the determined axes.