Three-dimensional data measuring system and three-dimensional data measuring method

A three-dimensional data measuring method using a three-dimensional data measuring system including:

• a measuring module including a prism that retroreflects incident light, an electronic distance meter configured to emit distance-measuring light toward a measurement range and receive reflected distance-measuring light from an irradiated point of the distance-measuring light, and to detect a distance to the irradiated point, an inertial measurement unit that detects posture information, a communication unit configured to receive prism position coordinates, and, a control arithmetic unit configured to calculate position coordinates of the measuring module based on the prism position coordinates and the posture information to calculate position coordinates of the irradiated point based on the position coordinates of the measuring module, the distance to the irradiated point, and the posture information;
• and a surveying instrument configured to measure a distance to and angle of the prism to acquire the prism position coordinates, and transmit the prism position coordinates to the communication unit,
• the system configured to acquire three-dimensional data of the measurement range,
• the method comprising:
• partitioning the measurement range into sections in a mesh manner each section having dimensions within the measurable range when the measurement range exceeds a measurable range in which the measuring module can measure a distance with a required accuracy, and
• performing measurement according to a guidance data in which a measurement route is set to minimize a travel distance of the measuring module among the sections.