Article
Geography, Physical
Zille Hussnain, Sander Oude Elberink, George Vosselman
Summary: The study focuses on improving trajectory accuracy in urban canyons by using corresponding points between aerial images and MLS data. Results indicate that this method can achieve near-decimetre level geo-referencing of point clouds in urban environments.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2021)
Article
Environmental Sciences
Lidu Zhao, Xiaping Ma, Zhongfu Xiang, Shuangcheng Zhang, Chuan Hu, Yin Zhou, Guicheng Chen
Summary: The extraction of landslide deformation using terrestrial laser scanning has many important applications. This study proposes a method to extract landslide deformations from TLS data by eliminating edge drift and using weighted least squares regularization solution. Experimental results show that the proposed method outperforms existing methods in landslide deformation extraction.
Article
Environmental Sciences
Wenxia Dai, Qingfeng Guan, Shangshu Cai, Rundong Liu, Ruibo Chen, Qing Liu, Chao Chen, Zhen Dong
Summary: This study investigates the performance of estimating plot canopy cover using Unmanned-Aerial-Vehicle (UAV)-Borne Laser Scanning (ULS) and Terrestrial Laser Scanning (TLS). The results show that ULS has better accuracy compared to TLS, and the difference increases with forest complexity. The study provides useful information for the selection of data sources and estimation methods in plot canopy cover mapping.
Article
Forestry
Enrique Perez-Martin, Serafin Lopez-Cuervo Medina, Tomas Herrero-Tejedor, Miguel Angel Perez-Souza, Julian Aguirre de Mata, Alejandra Ezquerra-Canalejo
Summary: This study examines the performance of an MLS with SLAM technology for tree inventory compilation in a historic garden, and evaluates the accuracy of DBH estimates using three fitting algorithms. The Monte Carlo fitting algorithm showed the best results, accurately estimating the DBH of most trees in the study.
Article
Geochemistry & Geophysics
Yuanzhi Cai, Lei Fan, Peter M. Atkinson, Cheng Zhang
Summary: This research proposes a novel image enhancement method to reveal the local geometric characteristics of point cloud data in images. The method explores various feature channel combinations and achieves improved semantic segmentation accuracy. Experimental results on the Semantic3D benchmark demonstrate the superiority of this image-based approach.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Review
Environmental Sciences
Tasiyiwa Priscilla Muumbe, Jussi Baade, Jenia Singh, Christiane Schmullius, Christian Thau
Summary: Savannas are diverse ecosystems with complex vegetation, conventional methods may underestimate carbon storage potential. TLS technology shows promise in accurate vegetation parameter extraction, future research should focus on algorithm development and improvement.
Review
Chemistry, Analytical
Chao Wu, Yongbo Yuan, Yang Tang, Boquan Tian
Summary: Terrestrial laser scanning (TLS) is a revolutionary technology gaining increasing interest in the fields of architecture, engineering, and construction (AEC) due to its automated, non-contact operation, and efficient large-scale sampling capability. This paper presents a systematic review of the progress and current status of TLS, categorizing major applications and identifying essential problems impacting its working effects. Future research directions are suggested to improve cost control, data processing capability, automatic scan planning, digital technology integration, and adoption of artificial intelligence in TLS.
Article
Environmental Sciences
Guotao Hu, Yin Zhou, Zhongfu Xiang, Lidu Zhao, Guicheng Chen, Tao Li, Jinyu Zhu, Kaixin Hu
Summary: This research presents a method for generating high-precision and fast RC bridges with chambers for geometric digital twin (gDT) using terrestrial laser scanning. The proposed method includes a fast point cloud data collection technique, Euclidean clustering and grid segmentation algorithms, and a framework based on the Dynamo-Revit reverse modelling method. The feasibility and accuracy of the method are validated through a comparison between the generated gDT model and the point cloud model.
Article
Chemistry, Analytical
Hyungjoon Seo, Yang Zhao, Cheng Chen
Summary: Point clouds obtained by laser scanning of various retaining structures were analyzed for displacement calculations based on local roughness and global curvature. Different methods (C2C, C2M, M3C2) were used to calculate displacement and analyze errors, with M3C2 method showing the lowest error and presenting optimized parameters for displacement analysis.
Article
Forestry
Chiung Ko, Seunghyun Lee, Jongsu Yim, Donggeun Kim, Jintaek Kang
Summary: This study utilized a LiDAR sensor to estimate tree characteristics in a Cryptomeria japonica forest in Jeju Island, South Korea. Results showed a 100% detection rate of standing trees by LiDAR, with high statistical accuracy in certain pathways and shorter processing times compared to traditional inventory methods. Further research is needed to confirm the efficiency of using backpack personal laser scanning in different forest stands.
Article
Construction & Building Technology
Mert Oytun, Guzide Atasoy
Summary: This study investigates the measurement accuracy of TLS in crack analysis for different building materials and proposes boundary ranges for different scan settings. The findings provide practical contributions to the use of TLS for crack identification.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Geochemistry & Geophysics
Kai Tan, Weiguo Zhang, Zhen Dong, Xiaolong Cheng, Xiaojun Cheng
Summary: Terrestrial laser scanning (TLS) technology can effectively retrieve the structural and biophysical attributes of trees by separating leaf and wood points using intensity and density data. The proposed method shows a high accuracy and efficiency in separating leaf and wood points, and can be robustly applied to various trees with different characteristics.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Chemistry, Analytical
Aimad El Issaoui, Ziyi Feng, Matti Lehtomaki, Eric Hyyppa, Hannu Hyyppa, Harri Kaartinen, Antero Kukko, Juha Hyyppa
Summary: This study explored the use of the Roamer-R4DW mobile laser scanning system for road rut depth measurement, developing an automatic algorithm to analyze rut depths and verifying the results against reference pavement plots. The study demonstrated that terrestrial laser scanning data can serve as a suitable reference for MLS-based rutting studies, with MLS-derived rut depths showing adequate precision for operational measurements. The data obtained from this study, covering both pavement and surrounding areas, has the potential for various road environment applications, including high-definition mapping, autonomous navigation, and digitalization of street environments.
Article
Chemistry, Analytical
Michael Bekele Maru, Donghwan Lee, Kassahun Demissie Tola, Seunghee Park
Summary: This study compared the performance of optical sensors (depth camera and terrestrial laser scanner) in estimating structural deflection. Bilateral filtering techniques were used to enhance the accuracy of point cloud data and increase the prospects of sensor application in structural health monitoring. Results showed that data obtained from TLS were better than those obtained from DC.
Article
Remote Sensing
Lina Fang, Hao Chen, Huan Luo, Yingya Guo, Jonathon Li
Summary: This paper presents a new intensity-enhanced method for mobile laser scanning point clouds. The method corrects the inconsistent intensity caused by different scanning distances and introduces the dark channel prior to transform intensity information adaptively. Multiple filters are used to remove isolated intensity noises.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2022)
Article
Remote Sensing
Guido Luzi, Anna Barra, Qi Gao, Pedro F. Espin-Lopez, Riccardo Palama, Oriol Monserrat, Michele Crosetto, Xavier Colell
Summary: A C-band low-cost active reflector was tested in an experimental campaign for monitoring a landslide-threatened area. With a network of passive corner reflectors and one active reflector installed along a forested slope, interferograms were processed to evaluate area stability. Despite temperature sensitivity, the active reflector operated with acceptable stability for deformation retrieval in monitoring purposes.
REMOTE SENSING LETTERS
(2022)
Article
Environmental Sciences
Jose Cuervas-Mons, Jose Luis Zezere, Maria Jose Dominguez-Cuesta, Anna Barra, Cristina Reyes-Carmona, Oriol Monserrat, Sergio Cruz Oliveira, Raquel Melo
Summary: This study provides a detailed analysis of subsidence phenomena in the Lisbon metropolitan area, finding that it is mainly associated with the compaction of alluvial and anthropic deposits in urban and industrial areas.
Editorial Material
Environmental Sciences
Daniele Giordan, Guido Luzi, Oriol Monserrat, Niccolo Dematteis
Article
Geochemistry & Geophysics
Niccolo Dematteis, Daniele Giordan, Bruno Crippa, Oriol Monserrat
Summary: Measuring glacier elevation change is crucial for various purposes, such as estimating glacier mass balance, calibrating climate models, and assessing the impact of global warming. In this study, we explored the potential of clinometry as a technique to quantify glacier elevation changes. By analyzing shadow positions in monoscopic optical images, we were able to measure a glacier thinning rate of -1.9 +/- 1.7 ma(-1) between 2017 and 2021 for the Aletsch Glacier (Switzerland), consistent with previous observations.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
Article
Geochemistry & Geophysics
Riccardo Palama, Oriol Monserrat, Bruno Crippa, Michele Crosetto, Guadalupe Bru, Pablo Ezquerro, Marta Bejar-Pizarro
Summary: This study investigates the potential of high-resolution synthetic aperture radar (SAR) images in generating digital elevation models (DEMs) using the radargrammetry technique. Two SAR images recorded by Capella Space X-band satellite radar sensor over La Palma during the Cumbre Vieja volcanic eruption are processed. An iterative point aggregation algorithm is adopted to identify matching pixels and height estimation is performed using distance minimization routine. The resultant radargrammetric DEM is validated against a lidar-based DEM, showing good agreement in less affected areas. Lava thickness estimation is conducted and compared with photogrammetry estimates from Pleiades mission data.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
Article
Environmental Sciences
Annalisa Mele, Michele Crosetto, Andrea Miano, Andrea Prota
Summary: The new European Ground Motion Service (EGMS) utilizes Synthetic Aperture Radar (SAR) images from Sentinel-1 satellites to study ground deformation phenomena and its impact on structures and infrastructures at a regional scale. The research aims to develop new methodologies to manage the large volume of data and propose a smart selection method for buildings affected by deformations above a given threshold. The proposed methodology is applied to case study areas in Barcelona, Spain, providing real support for urban area management.
Article
Environmental Sciences
Joan Botey i Bassols, Carmen Bedia, Maria Cuevas-Gonzalez, Sonia Valdivielso, Michele Crosetto, Enric Vazquez-Sune
Summary: This study focuses on verifying the capability of InSAR coherence to detect sediment transport events in arid environments. The results show that InSAR coherence can be used to remotely detect flash floods related sediment transport events and may have a greater detection ability than meteorological records.
Review
Chemistry, Multidisciplinary
Rosa Maria Mateos, Roberto Sarro, Andres Diez-Herrero, Cristina Reyes-Carmona, Juan Lopez-Vinielles, Pablo Ezquerro, Monica Martinez-Corbella, Guadalupe Bru, Juan Antonio Luque, Anna Barra, Pedro Martin, Agustin Millares, Miguel Ortega, Alejandro Lopez, Jorge Pedro Galve, Jose Miguel Azanon, Susana Pereira, Pedro Pinto Santos, Jose Luis Zezere, Eusebio Reis, Ricardo A. C. Garcia, Sergio Cruz Oliveira, Arnaud Villatte, Anne Chanal, Muriel Gasc-Barbier, Oriol Monserrat
Summary: Coastal regions in Southwest Europe have undergone significant changes due to tourism-related urban development, making them highly vulnerable to the impacts of climate change. This study analyzed extreme weather events along the Atlantic and Mediterranean coasts of Southwest Europe from 2009 to 2020, quantifying their impacts on fatalities, injuries, and economic losses. The results showed an upward trend in the number of events, as well as human losses and damages. The Mediterranean coast, especially the Spanish Mediterranean coast, had a higher exposure due to rapid tourism growth and inadequate preparation for marine storms.
APPLIED SCIENCES-BASEL
(2023)
Article
Environmental Sciences
Joan Botey i Bassols, Carmen Bedia, Maria Cuevas-Gonzalez, Sonia Valdivielso, Michele Crosetto, Enric Vazquez-Sune
Summary: InSAR coherence-change detection is a promising remote sensing technique for mapping areas affected by sediment transport in arid environments. This paper compares the results of four CCD mapping methods to evaluate the presence and importance of errors. The study concludes that CCD maps are reliable in identifying zones affected by sediment transport, but the precision in delimiting the affected area still needs improvement.
Proceedings Paper
Geosciences, Multidisciplinary
Riccardo Palama, Oriol Monserrat, Bruno Crippa, Michele Crosetto, Guadalupe Bru, Pablo Ezquerro, Marta Bejar-Pizarro
Summary: In this study, the potential of generating precise DEMs using SAR data is investigated. The adopted method involves radargrammetry on consecutive SAR images, and the resultant DEM is compared with a Lidar-based DEM to evaluate its accuracy.
2022 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2022)
(2022)
Article
Geochemistry & Geophysics
Lorenzo Nava, Maria Cuevas, Sansar Raj Meena, Filippo Catani, Oriol Monserrat
Summary: This letter proposes a deep learning-based approach to map artisanal and small-scale mining (ASM) in Burkina Faso. The study utilizes multispectral Sentinel-2 data and a small-size inventory in a semi-desert environment. The evaluation shows that the ADSMS U-Net architecture can accurately detect ASM and has a better performance than the basic U-Net. This approach offers a low-cost and efficient way to identify ASM using a few samples.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Proceedings Paper
Geography, Physical
M. Crosetto, L. Solari, A. Barra, O. Monserrat, M. Cuevas-Gonzalez, R. Palama, Y. Wassie, S. Shahbazi, S. M. Mirmazloumi, B. Crippa, M. Mroz
Summary: Radar interferometry has made significant progress as a powerful remote sensing technique for monitoring ground motion. The development of processing algorithms and increased data acquisition capability by spaceborne sensors, such as the Copernicus Sentinel-1 constellation, have enabled the development of A-DInSAR ground deformation services. This paper focuses on the European Ground Motion Service (EGMS), which is part of the Copernicus Land Monitoring Service managed by the European Environment Agency, and describes preliminary examples of deformation products from EGMS.
XXIV ISPRS CONGRESS: IMAGING TODAY, FORESEEING TOMORROW, COMMISSION III
(2022)
Proceedings Paper
Geography, Physical
Q. Gao, M. Crosetto, O. Monserrat, R. Palama, A. Barra
Summary: This paper focuses on the application of spaceborne radar interferometry in monitoring infrastructures, specifically railways and highways. The Persistent Scatterer Interferometry (PSI) technique is used to generate deformation maps using SAR IW-SLC images acquired by satellites. The study addresses the challenge of low density of persistent scatterers in rural areas by applying coherence threshold and Equivalent Spatial Coherence (Omega Factor) in the processing chain.
XXIV ISPRS CONGRESS: IMAGING TODAY, FORESEEING TOMORROW, COMMISSION III
(2022)
Proceedings Paper
Geography, Physical
N. Kotulak, M. Mleczko, M. Crosetto, R. Palama, M. Mroz
Summary: This article discusses the estimation of land deformation in a copper mining area using the Persistent Scatterer Interferometry (PSI) technique and data from the Sentinel-1 satellite. Two different PSI approaches were compared, both utilizing passive corner reflectors deployed in pairs towards satellites in ascending and descending orbits. The comparison was done using the line of sight geometry and validated using GNSS measurements. The results of the two PSI approaches were consistent with each other and congruent with observations from GNSS stations. However, further study is needed to investigate the slight differences in the responses of the corner reflectors.
XXIV ISPRS CONGRESS: IMAGING TODAY, FORESEEING TOMORROW, COMMISSION III
(2022)