Surveying device, and calibration method and calibration program for surveying device

A surveying device comprising:

• an optical system to be used for sighting a positioning target;
• a laser positioning part that emits laser light via the optical system to the positioning target to position the positioning target;
• a plane determining part that determines a location of a specific plane on a basis of a result of the positioning performed by the laser positioning part;
• a laser scanner that performs laser scanning of the specific plane to obtain multiple scanning points;
• a separation amount calculator that calculates a separation amount of the respective multiple scanning points obtained by the laser scanner, from the specific plane of which the location is determined by the plane determining part;
• and
• an appropriateness judging unit that judges an appropriateness of a calibrated condition relating to exterior orientation parameters of the laser positioning part and the laser scanner, on a basis of the calculated separation amount.

A calibration method of a surveying device, comprising:

• determining a location of a specific plane by positioning three or more points on the specific plane by using a laser positioning part;
• performing laser scanning of the specific plane by a laser scanner to obtain multiple scanning points;
• calculating a separation amount of the respective multiple scanning points obtained by the laser scanning, from the specific plane of which the location is determined;
• and
• calculating exterior orientation parameters of one or both of the laser positioning part and the laser scanner on a basis of the separation amount.