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dc.contributor.author
Schulz, Thorsten
dc.contributor.supervisor
Ingensand, Hilmar
dc.contributor.supervisor
Wunderlich, Thomas
dc.date.accessioned
2017-08-03T09:16:54Z
dc.date.available
2017-06-08T20:06:30Z
dc.date.available
2017-08-03T09:16:54Z
dc.date.issued
2008
dc.identifier.isbn
978-3-906467-71-9
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/10990
dc.identifier.doi
10.3929/ethz-a-005368245
dc.description.abstract
For several years now, terrestrial laser scanning has become an additional surveying technique in geodesy. Recent developments have improved several aspects of terrestrial laser scanners, e.g. the data acquisition rate, accuracy, and range. Since such instruments are relatively new and constructed by manufacturers who do not have advanced experience in surveying instruments, investigations are needed to assess the quality of the instrumental characteristics and the acquired data. In this way, manufacturers will understand the needs of geodesists and in turn enable geodesists to provide the necessary support in the development of improvements. This thesis has three objectives, the calibration and investigation of a terrestrial laser scanner, the post-processing of point clouds acquired by laser scanners, and applications of terrestrial laser scanning. The first objective is a comprehensive calibration and investigation of a specific laser scanner, the Imager 5003 of Zoller+Fr¨ohlich GmbH (Germany). The investigation and calibration procedures shall give a general impulse for all users of terrestrial laser scanning regarding instrumental and non-instrumental errors, the assessment of the quality of distance and angle measurements, and the influencing parameters. Laser scanners are a black box instrument that produces a huge number of 3D points in the form of a point cloud in a short time. However, it is the surveyor, who has to assess the reliability and quality of the resulting data. Therefore, the potential and the limitations of laser scanner systems must be identified. This is particularly important when a distance measurement is influenced by several parameters that can bias the data. Since laser scanning is an active surveying method, mostly independent of lighting conditions, distance measurements do not require prisms. Thus, surveying of almost every object is conceivable. The second objective involves post-processing of the point clouds. Terrestrial laser scanning consists not only of data acquisition, but also processing of the acquired 3D data, which include an intensity value of the reflected laser beam. The point clouds define the objects and the data contains nearly all the information about the objects due to the high sampling interval of laser scanners. To produce the final result, data processing needs to be completed and this can be quiet involving, e.g. registration, data filtering, noise reduction, triangulation, and modeling. The ratio between post-processing and data acquisition can be 10:1 or greater, which means ten (or more) days of post-processing follow one day of data acquisition. This aspect of post-processing applies for both static laser scanning and kinematic laser scanning. The only difference is that kinematic laser scanning requires an unique method of registration and geo-referencing. The third objective examines the applications of terrestrial laser scanning. Laser scanning can be used in different fields of applications, e.g. industrial metrology, cultural heritage, reverse engineering, and engineering geodesy. Due to the increased requirements regarding accuracy engineering geodesy appears to be a challenging field. Therefore, three different applications are presented which verify the successful use of terrestrial laser scanning in engineering geodesy. The first application involves the field of urban water management. A road surface was scanned to derive catchment areas and water flow directions. The second application covers the field of engineering geology. A tunnel during and after excavation was scanned to characterize rock mass structures and to derive displacement maps of surfaces and object points. Since the first two applications are based on static laser scanning, which means the laser scanner did not change in position and orientation during scanning, the third application is a kinematic one, which means the laser scanner was in motion during scanning. Such kinematic applications are of great interest since the performance of laser scanning can be increased significantly. Tunnels and roads are especially appropriate for kinematic laser scanning. The potential of kinematic laser scanning is tested by moving the laser scanner along a track line. The quality is assessed by scanning reference points.
en_US
dc.language.iso
en
en_US
dc.publisher
Institut für Geodäsie und Photogrammetrie an der Eidgenössischen Technischen Hochschule Zürich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
TERRESTRIAL AND AIRBORNE LASER SCANNING (GEODESY)
en_US
dc.subject
TERRESTRISCHES UND LUFTGESTÜTZES LASERSCANNING (GEODÄSIE)
en_US
dc.subject
CALIBRATION AND TESTING OF INSTRUMENTS (PHYSICS)
en_US
dc.subject
LASERABTASTUNG + LASERREGISTRIERUNG (LASERTECHNIK)
en_US
dc.subject
INGENIEURVERMESSUNG (GEODÄSIE)
en_US
dc.subject
ENGINEERING SURVEY (GEODESY)
en_US
dc.subject
EICHUNG UND PRÜFUNG VON MESSGERÄTEN (PHYSIK)
en_US
dc.subject
GEODETIC MEASURING METHODS (GEODESY)
en_US
dc.subject
AUSWERTUNG DER MESSERGEBNISSE (GEODÄSIE)
en_US
dc.subject
LASER SCANNING + LASER RECORDING (LASER ENGINEERING)
en_US
dc.subject
EVALUATION OF MEASURING RESULTS (GEODESY)
en_US
dc.subject
GEODÄTISCHE MESSVERFAHREN (GEODÄSIE)
en_US
dc.title
Calibration of a terrestrial laser scanner for engineering geodesy
en_US
dc.type
Doctoral Thesis
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.journal.title
Mitteilungen
ethz.journal.volume
96
en_US
ethz.size
158 S.
en_US
ethz.code.ddc
5 - Science::550 - Earth sciences
en_US
ethz.identifier.diss
17036
en_US
ethz.identifier.nebis
005368245
ethz.publication.place
Zürich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
03394 - Ingensand, Hilmar
en_US
ethz.leitzahl.certified
03394 - Ingensand, Hilmar
ethz.date.deposited
2017-06-08T20:06:38Z
ethz.source
ECOL
ethz.source
ECIT
ethz.identifier.importid
imp59364bfb4ec2e51192
ethz.identifier.importid
imp59366aabab8aa74996
ethz.ecolpid
eth:29471
ethz.ecitpid
pub:22086
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-20T16:34:55Z
ethz.rosetta.lastUpdated
2017-08-03T09:17:39Z
ethz.rosetta.versionExported
true
ethz.COinS
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