The application of lidar-derived digital elevation model analysis to geological mapping: an example from the Fundy Basin, Nova Scotia, Canada

Webster, Tim; Murphy, J. Brendan; Gosse, John C.; Spooner, Ian

doi:10.5589/m06-017

Cited by 37 publications

(21 citation statements)

References 44 publications

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“…Lidar has been used in a number of geoscience applications, including the analysis of river networks (Stock et al, 2005), the generation of cross-sections across rivers (Charlton et al, 2003), in general glaciology (Krabill et al, 1995(Krabill et al, , 2000, groundwater monitoring (Harding and Berghoff, 2000), investigation of landslides (McKean and Roering, 2003), and in the mapping of tectonic fault scarps and geomorphic features (Haugerud et al, 2003) and examining coastal processes (Brock et al, 2002). Lidar has been used to demonstrate improvements in mapping bedrock and surfical geology as well as landscape metrics such as stream incision, and to resolve and map the individual volcanic flow units of the North Mountain Basalt and the identification of crater structures within the lower flow unit (Webster et al, 2006(Webster et al, , 2006. Lidar has been merged with geophysical data to revise the geological boundaries along the Avalon-Meguma terrain boundary in Nova Scotia, Canada (Webster, Murphy and Quinn, 2009).…”

Section: Digital Elevation Models -Lidarmentioning

confidence: 99%

“…In areas of thicker glacial deposits along the coast, the raised beach terraces are more pronounced in the lidar DEM (Webster et al, 2006, A). These terraces represent sea-levels that where 35 m higher than present ca.…”

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confidence: 94%

“…As mentioned earlier, the North Mountain is underlain by basalt dipping northwest at 6 degrees. Webster et al (2006) used field checks and the lidar to constrain the individual flow units, especially in areas covered by glacial till. In areas of thick glacial till, the morphology of the flow units is not evident in the lidar because of the smoothed till cover.…”

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confidence: 99%

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Laser Altimetry: What Can Be Learned About Geology and Surface Processes from Detailed Topography

Webster¹

2012

Earth Sciences

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Section: Digital Elevation Models -Lidarmentioning

confidence: 99%

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confidence: 94%

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Laser Altimetry: What Can Be Learned About Geology and Surface Processes from Detailed Topography

Webster¹

2012

Earth Sciences

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“…Recent years brought an increase in the practical implementation of modern geophysical and photogrammetric methods in geological charting [1]. Geophysical method are used for the identification and interpretation of geological structure while the photogrammetric methods are often used to analyse the topographic formations.…”

Section: Introductionmentioning

confidence: 99%

An application of the geophysical methods and ALS DTM for the identification of the geological structure in the Kraśnik region – Lublin Upland, Poland

Kamiński

2017

E3S Web of Conferences

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Abstract. The purpose of the study was the assessment of the viability of selected geophysical methods and the Airborne Laser Scanning (ALS) for the identification and interpretation of the geological structure. The studied area is covered with a dense forest. For this reason, the ALS numerical terrain model was applied for the analysis of the topography. Three geophysical methods were used: gravimetric, in the form of a semi-detailed gravimetric photograph, Vertical Electrical Sounding (VES), and Electrical Resistivity Tomography (ERT). The numerical terrain model enabled the identification of Jurassic limestone outcrops and interpretation of the directions of the faults network. The geological interpretation of the digitally processed gravimetric data enabled the determination of the spatial orientation of the synclines and anticlines axes and of the course directions of main faults. Vertical Electrical Sounding carried along the section line perpendicular to the Gościeradów anticline axis enabled the interpretation of the lithology of this structure and identification of its complex tectonic structure. The shallow geophysical surveys using the ERT method enabled the estimation of the thickness of Quaternary formations deposited unconformably on the highly eroded Jurassic limestone outcrop. The lithology of Quaternary, Cretaceous and Jurassic rocks was also interpreted.

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“…The advent of airborne Light Detection and Ranging (LiDAR), offers a solution to overcome the vegetation cover problem and enhance topographical data spatial resolution, reaching 4 m or less (Kraus and Pfeifer 1998;Haugerud et al 2003). Such high-resolution topographic data greatly increases geological applications such as landslide mapping (Chang et al 2005;Chen et al 2006;Glenn et al 2006;Arrowsmith and Zielke 2009;de Rose and Basher 2011;Ventura et al 2011;Bremer and Sass 2012), fault and lineament mapping (Chan et al 2007; Chang et al 2010;Lan et al 2010;Sutinen et al 2014), and lithological mapping (Webster et al 2006;Grebby et al 2010). Although these studies have successfully recognized geological lineaments and morphology, the potential for applying airborne LiDAR data for the mapping of geological features, such as sedimentary strata boundaries, remains to be explored.…”

Section: Introductionmentioning

confidence: 99%

Derivation of Strike and Dip in Sedimentary Terrain Using 3D Image Interpretation Based on Airborne LiDAR Data

Yeh¹,

Chan²,

Chang³

et al. 2014

Terr. Atmos. Ocean. Sci.

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Traditional geological mapping may be hindered by rough terrain and dense vegetation resulting in obscured geological details. The advent of airborne Light Detection and Ranging (LiDAR) provides a very precise three-dimensional (3D) digital terrain model (DTM). However, its full potential in complementing traditional geological mapping remains to be explored using 3D rendering techniques. This study uses two types of 3D images which differ in imaging principles to further explore the finer details of sedimentary terrain. Our purposes are to demonstrate detailed geological mapping with 3D rendering techniques, to generate LiDAR-derived 3D strata boundaries that are advantageous in generating 2D geological maps and cross sections, and to develop a new practice in deriving the strike and dip of bedding with LiDAR data using an example from the north bank of the Keelung River in northern Taiwan. We propose a geological mapping practice that improves efficiency and meets a high-precision mapping standard with up to 2 m resolution using airborne LiDAR data. Through field verification and assessment, LiDAR data manipulation with relevant 3D visualization is shown to be an effective approach in improving the details of existing geological maps, specifically in sedimentary terrain.

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The application of lidar-derived digital elevation model analysis to geological mapping: an example from the Fundy Basin, Nova Scotia, Canada

Cited by 37 publications

References 44 publications

Laser Altimetry: What Can Be Learned About Geology and Surface Processes from Detailed Topography

Laser Altimetry: What Can Be Learned About Geology and Surface Processes from Detailed Topography

An application of the geophysical methods and ALS DTM for the identification of the geological structure in the Kraśnik region – Lublin Upland, Poland

Derivation of Strike and Dip in Sedimentary Terrain Using 3D Image Interpretation Based on Airborne LiDAR Data

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