A5085108897- Remote Sensing and LiDAR Applications
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- 3D Surveying and Cultural Heritage
- Coastal and Marine Dynamics
- Geological formations and processes
- Aeolian processes and effects
- Geological and Geophysical Studies Worldwide
- Landslides and related hazards
- Robotics and Sensor-Based Localization
- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Historical and Literary Analyses
- Infrastructure Maintenance and Monitoring
- Marine and fisheries research
- Advanced Memory and Neural Computing
- Flood Risk Assessment and Management
- Marine Biology and Ecology Research
- Military History and Strategy
- Cephalopods and Marine Biology
- Historical and Literary Studies
- Technology Assessment and Management
- Optical measurement and interference techniques
- Coastal and Marine Management
- Marine animal studies overview
Laboratoire d’Océanologie et de Géosciences
2011-2024
Institut Universitaire Européen de la Mer
2014-2024
Marine Technology Unit
2024
Ifremer
2022-2023
Université de Bretagne Occidentale
2019-2023
Centre National de la Recherche Scientifique
2011-2023
Geo-Ocean
2011-2021
University of Auckland
2012-2019
La Rochelle Université
2011
Delft University of Technology
2002
Long-term datasets documenting the evolution of coastal forms and processes, through provision recurring beach as well shoreface morphological observations accompanying time-series environmental controls, remain difficult to collect are rarely made available. However, they increasingly needed further our understanding change improve models that will help planning what future coast be. This data descriptor presents results topographic bathymetric surveys at Porsmilin, a macrotidal embayed...
The present article describes a new and efficient method of Real Time Kinematic (RTK) Global Navigation Satellite System (GNSS) assisted terrestrial Structure-from-Motion (SfM) photogrammetry without the need for Ground Control Points (GCPs). system only requires simple frame that mechanically connects RTK GNSS antenna to camera. is low cost, easy transport, offers high autonomy. Furthermore, not requiring GCPs enables saving time during in situ acquisition data processing. tested coastal...
Abstract In situ measurement of grain‐scale fluvial morphology is important for studies on grain roughness, sediment transport and the interactions between animals geomorphology, topics relevant to many river practitioners. Close‐range digital photogrammetry (CRDP) terrestrial laser scanning (TLS) are two most common techniques obtain high‐resolution elevation models (DEMs) from surfaces. However, field application topography remote sensing at scale presently hindered mainly by tedious...
With recent advances in photogrammetric processing methods and sensor technologies, smartphones represent a new opportunity of mainstream, low-cost sensor, with great potential for Structure-from-Motion (SfM) photogrammetry, particular participatory science programs or citizen observatories. Keeping mind the application observatories, three smartphone models (Galaxy S7®, Lumia 930® iPhone 8®) bridge camera were compared (separately combination) coastal applications: A cliff sandy beach....
In this two-part study, experiments are conducted to evaluate available topography measurement techniques for gravel beds in a laboratory flume and study their suitability statistical roughness analysis. The instruments include (1) an acoustic bed profiler; (2) hand-held laser scanner; (3) two digital consumer cameras forming stereophotogrammetric system, employed obtain elevation models (DEMs) of water-worked beds. the first part three reviewed feasibilities future grain-scale work...
Abstract There is a growing consensus that gravel‐bed roughness should be parameterized based on bed‐surface topography, not only sediment size. One benefit the possible identification of various spatial scales surface and evaluation their respective contributions to flow resistance (and also bedload transport). The absence relationships between at different apparent in previous work, which currently limits parameterization from topography application modeling. This study examines use...
Advances in image-based remote sensing using unmanned aerial vehicles (UAV) and structure-from-motion (SfM) photogrammetry continue to improve our ability monitor complex landforms over representative spatial temporal scales. As with other water-worked environments, coastal sediments respond shaping processes through the formation of multi-scale topographic roughness. Although this complexity can be an important marker hydrodynamic forces sediment transport, it is seldom characterized...
Abstract Remotely sensed digital elevation models (DEMs) and uncertainty‐based geomorphic change detection have become very practical tools for geoscientists, including coastal research. Through the analysis of DEMs differences (DoDs) provision DEM quality, it allows monitoring complex landforms confidently relating changes observed to environmental forcing conditions. With continuing remote sensing advances, as some programmes are reaching several decades repeated data collection, is timely...
Abstract Using stereo photogrammetry to obtain digital elevation models ( DEM s) for surface topography analysis is becoming popular in hydraulic research, especially coarse gravel beds. This paper assesses the quality by using a realistic 3D printed gravel‐bed model, with known elevations every 0·25 mm, as ground truth. Two Nikon D5100 cameras and non‐proprietary photogrammetric software camera calibration reconstruction are used study. A measured compared point truth displays very high...
Digital elevation models (DEMs) have been increasingly applied in topographic studies areas such as physical geography and hydraulic engineering. Several methods proposed to reconstruct DEMs, including classic close-range stereo photogrammetry the more novel Structure from Motion (SfM) methodology. Past published tend apply SfM large-scale environmental processes, whilst stereophotogrammetry is focusing on detailed small-scale applications. However, requires multiple ground control points...
Research Article| May 01, 2018 Assessing Intra-Bar Variations in Grain Roughness Using Close-Range Photogrammetry Jane Groom; Groom Department of Civil and Environmental Engineering, University Auckland, New Zealand Search for other works by this author on: GSW Google Scholar Stéphane Bertin; Bertin Heide Friedrich Author Article Information e-mail: jgro800@aucklanduni.ac.nz Publisher: SEPM Society Sedimentary Geology First Online: 01 Online Issn: 1938-3681 Print 1527-1404 Copyright © 2018,...
Abstract Coastal boulder deposits (CBDs), named huracanolitos in Cuba, found along rocky shores, result from storms, tropical cyclones or tsunamis. Despite being important indicators for coastal hazard assessment, determining the mode of emplacement CBDs (storm/hurricane tsunami) is not easy. We present, first time English, data about shores Cuban Archipelago. More specifically, we focused on a CBD, that is, to our knowledge, largest one ever described Cuba Island. Located low‐lying coral...
The process of efficient and effective DEM merging is increasingly becoming more important.To allow analysis for features different scales, an increase in surface coverage cannot result reduced measurement resolution.It thus inevitable that individual highresolution DEMs will become common practice applications such as hydraulic roughness studies fluvial surfaces.This paper presents solution, whereby accurate co-registration collected from consistent viewpoints standard averaging overlapping...
Unmanned aerial systems (UAS) and structure-from-motion photogrammetry are transforming the way we produce topo- graphic data, with applications covering many disciplines in geosciences, including coastal studies. To overcome limitations of ground control points (GCPs), evaluate direct georeferencing (DG) consumer UAS imagery for cost-effective measurement beach topography. Using DG, camera positions determined on-board instruments provide air photogrammetry, obviating need presurveyed GCPs....
Abstract Gravel riverbeds naturally present a range of sediment size that can span several orders magnitude. However, fine (i.e., <2 mm) additions affect transport and are potentially harmful to the river ecology. Limited research has been done understand effects sand addition on gravel bed topography. For this study, we conducted flume experiments testing effectiveness topography remote sensing measure response water‐worked varying flushing. Repeated measurements with through‐water...
Remote sensing of riverine gravel-beds has been shown to be fundamental derive a theoretically driven definition the hydraulic roughness and understand complex processes at sediment-water interface. Commonly, 2D gravel-bed topography was recorded analyzed, only more recently technology allowed measurement high-resolution 3D Digital Elevation Models (DEMs). Equipment do so is limited Terrestrial Laser-Scanners (TLS) proprietary stereo-photogrammetric systems associated commercial software....
To assess coastal hazard where Coastal boulder deposits (CBDs) are found, it is crucial to constrain the forces governing their emplacement: from either storms/tropical cyclones or tsunamis. Here we focus on CBDs island of Cuba and extreme climatic events responsible for formation. Four sites being studied identify produced during known hurricanes over last fifty years.The selected located a low-lying coral reef terrace Cuban shore, emplaced by hurricane 1935, Lili 1996 Matthew 2016. These...
We propose to integrate the newest developments in stereomatching theory, affordable parallel processing capabilities (using GPU e.g. PC gaming/graphic card) and statistical surface analysis implement test an in-situ Underwater Dynamic Stereo Photogrammetry (UDSP) system for civil engineering applications. The proposed UDPS aims provide underwater Digital Elevation Models (DEM), applications such as a two-dimensional discrete matrix of data elevations. Experiments on river bed...