Airborne and terrestrial laser scanning - download pdf or read online

By George Vosselman, Hans-Gerd Maas

ISBN-10: 1628700920

ISBN-13: 9781628700923

ISBN-10: 184995013X

ISBN-13: 9781849950138

Written by means of a crew of overseas specialists, this publication presents a complete assessment of the foremost purposes of airborne and terrestrial laser scanning. It specializes in rules and strategies and offers an built-in therapy of airborne and terrestrial laser scanning know-how. After attention of the know-how and processing equipment, the e-book turns to functions, corresponding to engineering, forestry, cultural history, extraction of 3D development types, and cellular mapping. This ebook brings jointly a number of the elements of the topic in a coherent textual content that might be correct for complex scholars, lecturers and practitioners.

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Extra info for Airborne and terrestrial laser scanning

Example text

Projection of multiple lines or strip patterns enables full-field techniques without the necessity of scanning. , 2006]. Such systems are based on a floodlight device projecting light on the area of interest and a bi-dimensional device capturing time-of-flight data. They are often reported as flash LADAR (light detecting and ranging) or focal plane time-of-flight systems. 10 shows a number of different scan mechanisms which are in use in airborne and/or terrestrial laser scanners. Oscillating mirror: Many commercial airborne systems utilise the oscillating mirror technique, in which a swivelling mirror directs the laser pulse across the swath.

2006]. Such systems are based on a floodlight device projecting light on the area of interest and a bi-dimensional device capturing time-of-flight data. They are often reported as flash LADAR (light detecting and ranging) or focal plane time-of-flight systems. 10 shows a number of different scan mechanisms which are in use in airborne and/or terrestrial laser scanners. Oscillating mirror: Many commercial airborne systems utilise the oscillating mirror technique, in which a swivelling mirror directs the laser pulse across the swath.

14). Airborne scanners allow scan angles between about 5° and 75°. For example, the swath width will be 574 m at a height of 1000 m and a scan angle of 32°. The laser beam widens with the distance from the laser scanner. 14). 1 mrad and 1 mrad. 2 mrad. The laser beam profile does not have sharp edges, but the irradiance falls off gradually away from the centre of the beam. 2). 5 Pulse repetition frequency and point density In the 1990s most airborne lidar systems were characterised by pulse repetition frequencies (PRF) in the low kilohertz range.

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


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