Article
Environmental Sciences
Andrej Novak, Kristof Ostir
Summary: Alpine topography is shaped by complex geomorphological processes, with Quaternary sedimentary bodies being the youngest and most diverse landforms. The use of digital elevation models and visualization techniques such as analytical hillshading can aid in identifying and studying Quaternary sedimentary bodies and processes in alpine landscapes.
Article
Computer Science, Interdisciplinary Applications
Xin Mao, Jun Kang Chow, Zhaoyu Su, Yu-Hsing Wang, Jiaye Li, Tao Wu, Tiejian Li
Summary: The study introduced distributed representations of aspect features, adopted the U-Net model and postprocessing method to improve the accuracy and efficiency of deep learning models in drainage network extraction.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Geography, Physical
Daniel L. Harris, Jody M. Webster, Ana Vila-Concejo, Stephanie Duce, Javier X. Leon, Jorg Hacker
Summary: A decline in coral reef surface roughness may indicate functional collapse of the ecosystem. Limited spatial extents of ecological surveys has hindered understanding of surface roughness changes at ecosystem scales. This study used high-resolution Light Detection and Ranging (LiDAR) to investigate surface roughness of a coral reef across multiple spatial scales. The results identified important fine scale features and geomorphic zones that contribute to coral reef roughness, while also highlighting the influence of morphodynamic processes at broader spatial scales. These findings can support future management and research efforts, such as monitoring ecosystem response to environmental change and restoration programs.
Article
Environmental Sciences
Christian Koski, Pyry Kettunen, Justus Poutanen, Lingli Zhu, Juha Oksanen
Summary: Vector datasets of small watercourses are important but mapping them with traditional methods is laborious and costly. Convolutional neural networks (CNNs) have shown effectiveness in extracting small watercourses from LiDAR point clouds, DEMs, and aerial images. However, the cause of false predictions by machine-learning models is often not explored, leading to limited understanding of their impact on producing accurate datasets.
Article
Geochemistry & Geophysics
Jessie L. Vermeer, Mark C. Quigley, Brendan G. Duffy, Robert M. Langridge, Jarg R. Pettinga
Summary: Through the study of the structure and kinematics of the Hope, Kelly, and Alpine faults in New Zealand, it is found that the slip rate of the Alpine fault transfers to the eastern dextral central Hope Fault via the Hope-Kelly fault system. The interactions among these faults within seismogenic depths control surface rupture geometries and kinematics, showcasing ongoing structural interactions in active faulting at the intersection.
Article
Environmental Sciences
Rok Ciglic, Spela Conc, Mateja Breg Valjavec
Summary: This study aims to highlight the applicability of high-resolution relief laser scanning data in geomorphological studies of karst depressions. Through empirical research in three areas of the Slovene Dinaric Karst, it was found that different data preprocessing and detection methods can influence the number and geomorphometric characteristics of depressions, as well as comparisons between study areas.
Article
Computer Science, Interdisciplinary Applications
Anett Fekete, Mate Cserep
Summary: With the increasing affordability and accessibility of LiDAR technology, the analysis of point clouds constructed by laser scanning is becoming more prominent. Airborne LiDAR is particularly valuable for land object analysis and classification, while our research aims to define an automated methodology for vegetation segmentation and change detection in urban areas. The algorithm proposed in our study proved to be effective for qualified and quantified change detection of trees, including height and volume changes, providing a robust approach that can scale dynamically to large areas.
COMPUTERS & GEOSCIENCES
(2021)
Article
Environmental Sciences
Benjamin Stular, Edisa Lozic, Stefan Eichert
Summary: This paper introduces the concept of an archaeology-specific DEM and highlights the importance of confidence mapping for archaeological interpretation. The study also discusses the unresolved issue of segmentation in DEM interpolation and aims to contribute to the methodological maturity of airborne LiDAR in archaeology.
Article
Ecology
Justin T. Ridge, Alexandra E. DiGiacomo, Antonio B. Rodriguez, Joshua D. Himmelstein, David W. Johnston
Summary: Physical structures generated by ecosystem engineers have significant impacts on ecosystems and surrounding landscapes. The Eastern oyster Crassostrea virginica forms intertidal reefs, which provide important nursery and foraging habitats for marine life and stabilize shorelines. Various tools, including remote sensing methods, are available to measure the three-dimensional properties of intertidal habitats. In this study, we used terrestrial laser scanning and drone imagery to measure oyster reef structures and found that drone surveys produced accurate and consistent results, making them highly useful for oyster conservation and restoration.
REMOTE SENSING IN ECOLOGY AND CONSERVATION
(2023)
Article
Marine & Freshwater Biology
Daniel L. Warner, John A. Callahan, Thomas E. McKenna, Catherine Medlock
Summary: This study aimed to develop and compare bias reduction approaches for digital elevation models (DEMs) using LiDAR derivatives in tidal marshes. An ensemble of deep neural networks performed best at removing vertical DEM bias and reducing DEM uncertainty. The application of this corrected DEM provides more accurate interpretations of marsh platform inundation.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Geochemistry & Geophysics
Jessie L. Vermeer, Mark C. Quigley, Robert M. Langridge, Brendan G. Duffy, Zoe K. Mildon, Manuel-Lukas Diercks
Summary: Plate boundary faulting in New Zealand's South Island involves the transfer of about 50% of slip from the Alpine Fault to the Hope-Kelly Fault system. This study explores the slip-rate contributions of different faults in the Hope-Kelly system and the possible role of static stresses in facilitating slip transfer. Through geomorphic and fault mapping combined with luminescence dating, the slip-rates of the Hope and Kelly faults have been determined. The findings suggest that earthquakes on the central Alpine Fault may trigger ruptures of the Hope-Kelly Faults, but ruptures on the Hope-Kelly Faults reduce stress on the northern Alpine Fault, making ruptures on that fault less likely. This system of stress perturbations provides a mechanism for slip transfer from the central Alpine Fault onto the Hope Fault system.
Article
Environmental Sciences
Sean Krisanski, Mohammad Sadegh Taskhiri, Susana Gonzalez Aracil, David Herries, Allie Muneri, Mohan Babu Gurung, James Montgomery, Paul Turner
Summary: The research focuses on developing a robust, sensor-agnostic and fully automated forest point cloud measurement tool called the Forest Structural Complexity Tool (FSCT), which aims to improve the reliability and accuracy of forest measurement in research and industry.
Article
Environmental Sciences
Sean Krisanski, Mohammad Sadegh Taskhiri, Susana Gonzalez Aracil, David Herries, Paul Turner
Summary: Forest inventories are crucial for informed decision-making in forest resource management and conservation, but the laborious process of data collection using traditional tools can lead to errors in complex forests. This research demonstrates an effective deep learning approach for semantically segmenting high-resolution forest point clouds in diverse environments, addressing the challenge of inaccurate measurements in complex forests.
Article
Environmental Sciences
Christopher B. Marsh, Phillip Harder, John W. Pomeroy
Summary: Space-based, global-extent digital elevation models (DEMs) are important for many Earth sciences applications, but the presence of tree canopies in forested areas can lead to biases in digital surface models (DSMs), obscuring topographic features. Using statistical relationships and machine learning, the Forest And Buildings removed Copernicus DEM (FABDEM) has been created to eliminate these biases. The FABDEM was validated against UAV-based lidar data and showed significant improvement over existing deforested DEM products in mountainous areas. The study supports the use of FABDEM as the best-in-class data product for forested mountain catchments.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2023)
Article
Environmental Sciences
Qiong Gao, Mei Yu
Summary: This study used LiDAR point clouds to analyze the changes in canopy height of coastal mangroves in Puerto Rico before and after hurricanes, and identified the factors influencing these changes. The results showed that pre-hurricane canopy height was affected by elevation, distance to rivers/canals, distance to coast, tree density, and canopy unevenness. Additionally, rainfall during hurricanes was found to be an important factor causing canopy damage.
Article
Geosciences, Multidisciplinary
Annemarie Christophersen, Nicola Litchfield, Kelvin Berryman, Richard Thomas, Roberto Basili, Laura Wallace, William Ries, Gavin P. Hayes, Kathleen M. Haller, Toshikazu Yoshioka, Richard D. Koehler, Dan Clark, Monica Wolfson-Schwehr, Margaret S. Boettcher, Pilar Villamor, Nick Horspool, Teraphan Ornthammarath, Ramon Zuniga, Robert M. Langridge, Mark W. Stirling, Tatiana Goded, Carlos Costa, Robert Yeats
Article
Geochemistry & Geophysics
P. Villamor, P. Almond, M. P. Tuttle, M. Giona-Bucci, R. M. Langridge, K. Clark, W. Ries, S. H. Bastin, A. Eger, M. Vandergoes, M. C. Quigley, P. Barker, F. Martin, J. Howarth
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2016)
Article
Geology
M. Persaud, P. Villamor, K. R. Berryman, W. Ries, J. Cousins, N. Litchfield, B. V. Alloway
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2016)
Article
Geology
R. M. Langridge, W. F. Ries, N. J. Litchfield, P. Villamor, R. J. Van Dissen, D. J. A. Barrell, M. S. Rattenbury, D. W. Heron, S. Haubrock, D. B. Townsend, J. M. Lee, K. R. Berryman, A. Nicol, S. C. Cox, M. W. Stirling
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2016)
Article
Geology
Catherine Reid, Ursula Cochran, Kate Clark, Islay Marsden, Nicola Litchfield, Will Ries
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2017)
Article
Geology
R. M. Langridge, W. F. Ries, J. F. Dolan, E. R. Schermer, C. Siddoway
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2017)
Article
Geochemistry & Geophysics
P. Villamor, K. R. Berryman, S. M. Ellis, G. Schreurs, L. M. Wallace, G. S. Leonard, R. M. Langridge, W. F. Ries
Article
Geosciences, Multidisciplinary
Monica Giona Bucci, Peter Almond, Pilar Villamor, William Ries, Carol Smith, Martitia Tuttle
Article
Geography, Physical
Richard J. Taylor, Chris Massey, Ian C. Fuller, Mike Marden, Garth Archibald, William Ries
Article
Engineering, Civil
Chris I. Massey, Mauri J. McSaveney, Tony Taig, Laurie Richards, Nicola J. Litchfield, David A. Rhoades, Graeme H. McVerry, Biljana Lukovic, David W. Heron, William Ries, Russ J. Van Dissen
EARTHQUAKE SPECTRA
(2014)
Article
Geography, Physical
D. Heron, B. Lukovic, C. Massey, W. Ries, M. McSaveney
JOURNAL OF SPATIAL SCIENCE
(2014)
Article
Geochemistry & Geophysics
K. J. Clark, E. K. Nissen, J. D. Howarth, I. J. Hamling, J. J. Mountjoy, W. F. Ries, K. Jones, S. Goldstien, U. A. Cochran, P. Villamor, S. Hreinsdottir, N. J. Litchfield, C. Mueller, K. R. Berryman, D. T. Strong
EARTH AND PLANETARY SCIENCE LETTERS
(2017)
Article
Engineering, Geological
Mark W. Stirling, N. J. Litchfield, P. Villamor, R. J. Van Dissen, A. Nicol, J. Pettinga, P. Barnes, R. M. Langridge, T. Little, D. J. A. Barrell, J. Mountjoy, W. F. Ries, J. Rowland, C. Fenton, I. Hamling, C. Asher, A. Barrier, A. Benson, A. Bischoff, J. Borella, R. Carne, U. A. Cochran, M. Cockroft, S. C. Cox, G. Duke, F. Fenton, C. Gasston, C. Grimshaw, D. Hale, B. Hall, K. X. Hao, A. Hatem, M. Hemphill-Haley, D. W. Heron, J. Howarth, Z. Juniper, T. Kane, J. Kearse, N. Khajavi, G. Lamarche, S. Lawson, B. Lukovic, C. Madugo, J. Manousakis, S. McColl, D. Noble, K. Pedley, K. Sauer, T. Stahll, D. T. Strong, D. B. Townsend, V. Toy, M. Villeneuve, A. Wandres, J. Williams, S. Woelz, R. Zinke
BULLETIN OF THE NEW ZEALAND SOCIETY FOR EARTHQUAKE ENGINEERING
(2017)
Article
Engineering, Geological
R. Van Dissen, M. McSaveney, D. Townsend, G. Hancox, T. A. Little, W. Ries, N. Perrin, G. Archibald, G. Dellow, C. Massey, S. Misra
BULLETIN OF THE NEW ZEALAND SOCIETY FOR EARTHQUAKE ENGINEERING
(2013)