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LaDiCaoz and LiDARimager, MATLAB GUIs for LiDAR data handling and lateral displacement measurement

Olaf Zielke and J. Ramon Arrowsmith
LaDiCaoz and LiDARimager, MATLAB GUIs for LiDAR data handling and lateral displacement measurement
Geosphere (Boulder, CO) (February 2012) 8 (1): 206-221

Abstract

Light detection and ranging (LiDAR), high-resolution topographic data sets enable remote identification of submeter-scale geomorphic features and have proven very valuable in geologic, paleoseismic, and geomorphologic investigations. They are also useful for studies of hydrology, timber evaluation, vegetation dynamics, coastal monitoring, hill-slope processes, or civil engineering. One application for LiDAR data is the measurement of tectonically displaced geomorphic markers to reconstruct paleoearthquake slip distributions--currently a cornerstone in the formulation of earthquake recurrence models and the understanding of seismic fault behavior. With this publication we provide two MATLAB-based graphical user interfaces (GUIs) and corresponding tutorials: LiDARimager--a tool for LiDAR data handling and visualization (e.g., data cropping, generation of map- and oblique-view plots of various digital elevation model [DEM] derivatives, storable as *.jpg or *.kmz files); and LaDiCaoz--a tool to determine lateral displacements of offset sublinear geomorphic features such as stream channels or alluvial fan edges. While application of LaDiCaoz is closely linked to tectonogeomorphic studies, LiDARimager may find application in a wide range of studies that utilize LiDAR data visualizations. A key feature of LaDiCaoz, not available in standard geographic information system (GIS) packages, is DEM slicing and (laterally) back slipping for visual offset reconstruction assessment, improving measurement accuracy and precision. Comparison of offset measurements, made by different individuals, showed good measurement repeatability with LaDiCaoz for morphologically simple channels. Offset estimates began to vary distinctly for morphologically more complex features, attributed to different assumptions of pre-earthquake morphology and underlining the importance of a sound understanding of pre-earthquake site morphology for meaningful offset measurements.


EISSN: 1553-040X
Serial Title: Geosphere (Boulder, CO)
Serial Volume: 8
Serial Issue: 1
Title: LaDiCaoz and LiDARimager, MATLAB GUIs for LiDAR data handling and lateral displacement measurement
Affiliation: Arizona State University, School of Earth and Space Exploration, Bateman Physical Sciences Center, Tempe, AZ, United States
Pages: 206-221
Published: 201202
Text Language: English
Publisher: Geological Society of America, Boulder, CO, United States
References: 31
Accession Number: 2012-035813
Categories: GeomorphologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201219
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