Laser scanner

(Concerns mobile and airborne laser scanning) An integrated IMU/GNSS system consists of at least an inertial measurement unit (IMU) and a GNSS receiver, and provides the trajectory of the IMU coordinate system by post-processing raw data from IMU, GNSS receiver, and a GNSS base station. By mechanically fixing the IMU to the laser scanner, the trajectory also gives the position and orientation of the laser scanner over time so that the point cloud provided by the laser scanner can be transformed into the coordinate system the trajectory is specified in (usually WGS84).

A laser scanner is an optical measurement instrument which scans the surfaces and geometries of objects with a laser beam point by point and without contact. The laser scanner detects the reflected beam. The captured scanning data is processed digitally.

A laser scanner is an optical measuring instrument which captures measurement points in the three-dimensional space without contact. Due to the registration of a close-meshed mesh of points, complex geometries can be illustrated in a so-called point cloud. In order to register more complex objects, several measurements from various perspectives are required.