Airborne and terrestrial laser scanning by George Vosselman, Hans-Gerd Maas

By George Vosselman, Hans-Gerd Maas

Written through a staff of overseas specialists, this e-book presents a entire evaluate of the most important functions of airborne and terrestrial laser scanning. It specializes in rules and techniques and offers an built-in remedy of airborne and terrestrial laser scanning expertise. After attention of the know-how and processing tools, the e-book turns to purposes, resembling engineering, forestry, cultural history, extraction of 3D construction versions, and cellular mapping. This ebook brings jointly a few of the features of the topic in a coherent textual content that would be proper for complicated scholars, lecturers and practitioners.

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1 Gbyte per hour. Operator laptop: this serves as a means of communications with the control and data recording unit, to set up mission parameters, and to monitor the system’s performance during the survey. Flight management system: this is a means for the pilot to display the preplanned flight lines, which provides support for him in completing the mission. An airborne laser scanner is completed by a GPS ground station. The ground station serves as a reference station for off-line differential GPS (DGPS) calculation.

D Interestingly, the range between 2 m and 10 m represents a transition between triangulation and time-delay based systems, while triangulation systems very clearly dominate in the sub-metre range. Several phase-based (AM) systems are now covering that zone [Fröhlich and Mettenleiter, 2004]. g. g. 40° × 40°. Larger scan areas are sometimes accomplished with ancillary systems such as articulated arms, laser trackers or photogrammetric techniques. 5. 6b). 6(c). e. , 1984]. 1 need to be coupled to optomechanical, solid-state scanners or, more recently, integrated into semiconductor devices to capture and record surfaces of objects and sites.

The laser beam is scanned in one direction with a scanning mirror and the device assembly is rotated with a mechanical stage. This is typical for terrestrial scanners with a panoramic or hemispheric field of view. g. , 2000]. The laser beam is scanned in one direction and mounted in an aircraft or on a vehicle. In this case the second scanning direction is provided by aircraft or vehicle motion, and a GPS (global positioning system)/IMU (inertial measurement unit) combined unit is used to measure the position and orientation of the platform.

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