Survey data processing apparatus, survey data processing method and survey data processing program

A survey data processing method comprising steps of:

• performing primary laser scanning by a laser scanner in a range containing multiple optical reflection targets of which arrangement positions are known;
• extracting luminescent points of reflection light from the multiple optical reflection targets among laser scan data obtained by performing the primary laser scanning;
• performing secondary laser scanning in the multiple optical reflection targets based on the luminescent points of the multiple optical reflection targets;
• calculating position of the laser scanner by the backward intersection method based on each measured position of the multiple optical reflection targets obtained by the secondary laser scanning;
• and
• calculating position of each point in the laser scan data obtained by performing the primary laser scanning based on the calculated position of the laser scanner.

A non-transitory computer recording medium storing computer executable instructions that, when executed by a computer processor, cause the computer processor to perform operations for a survey data processing program, comprising:

• performing primary laser scanning by a laser scanner in a range containing multiple optical reflection targets of which arrangement positions are known;
• extracting luminescent points of reflection light from the multiple optical reflection targets among laser scan data obtained by performing the primary laser scanning;
• performing secondary laser scanning in the multiple optical reflection targets based on the luminescent points of the multiple optical reflection targets;
• calculating position of the laser scanner by the backward intersection method based on each measured position of the multiple optical reflection targets obtained by the secondary laser scanning;
• and
• calculating position of each point in the laser scan data obtained by performing the primary laser scanning based on the calculated position of the laser scanner.