Motion Analysis of Fast Flowing Glaciers from Multi-temporal Terrestrial Laser Scanning Bewegungsanalyse schnell fließender Gletscher aus multi-temporalen terrestrischen Laserscanneraufnahmen

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Abstract:

Long range terrestrial laser scanners may depict a rather interesting measuring device for glaciology research. The paper reports on practical experiences using a Riegl LPM-321 laser scanner at an outlet glacier in West Greenland. With the instrument positioned on a hill, a maximum range of 4000 meter could be achieved on glacier ice. The scanner delivers a high quality glacier surface model, which can be used to determine parameters such as the height of the glacier front and the width of crevasses. Moreover, multi-temporal scans allow for the determination of 3D glacier surface velocity information by point cloud matching techniques. For the Jacobshavn Isbræ glacier velocities up to 40 meter per day could be observed.

German
Terrestrische Laserscanner mit hoher Reichweite stellen ein interessantes Messwerkzeug für die Glaziologie dar. Der Beitrag berichtet über praktische Erfahrungen mit einem Laserscanner Riegl LPM-321 an einem grönländischen Gletscher, an dem die lokale Topographie die Messung der Gletscheroberfläche von einem Hügel erlaubte. Bei der Messung auf Gletschereis konnte eine Reichweite von 4000 Meter erreicht werden. Der Scanner liefert ein hochwertiges Modell der Gletscheroberfläche, aus dem u.a. die Höhe der Gletscherfront und die Breite von Gletscherspalten extrahiert werden kann. Multi-temporale Laser-scanneraufnahmen erlauben über die Herstellung von Korrespondenzen in 3D-Punktwolken die Bestimmung von Bewegungen der Oberfläche des Gletschers, der eine Geschwindigkeit von bis zu 40 Metern pro Tag aufweist. Hierzu wurden Verfahren der Kreuzkorrelation sowie eine Iterative Closest Point (ICP)-Implementation verwendet.

Keywords: GLACIOLOGY; POINT CLOUD MATCHING; TERRESTRIAL LASER SCANNING; TRACKING

Language: German

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0935-1221/2009/0009

Publication date: February 1, 2009

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  • Photogrammetrie - Fernerkundung - Geoinformation (PFG) is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the intricately connected field of geoinformation processing.

    Papers published in PFG highlight new developments and applications of these technologies in practice. The journal hence addresses both researchers and student of these disciplines at academic institutions and universities and the downstream users in both the private sector and public administration.

    PFG places special editorial emphasis on the communication of new methodologies in data acquisition, new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general.

    PFG is the official journal of the German Society of Photogrammetry and Remote Sensing.
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