TLS-Detectable Plane Changes for Deformation Monitoring

Kregar, Klemen; Marjetič, Aleš; Savšek, Simona

doi:10.3390/s22124493

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…However, the third component, originally carried out by using both TLS and TPh, showed that the use of these remote sensing techniques under a traditional approach may entail recurrent problems when they are applied to deformation monitoring in large areas with strong orography and physical obstructions [8,11]. The problems that are usually found can be classified into three types as follows: (1) difficulties in setting up stations that are well distributed near the area of interest, (2) difficulties in either the TLS registration process or the absolute orientation of the TPh models because of the lack of CPs in the target area, and (3) difficulties in obtaining full coverage leading to data gaps in the point clouds [9,12,13].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Panorama Photogrammetry as a Tool for Long-Range Deformation Monitoring

Javadi,

García-Asenjo,

Luján

et al. 2024

Sensors

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This study investigates panorama photogrammetry (PPh) as a potential method to collect massive 3D information for long-range deformation monitoring. Particularly, this study focuses on areas with measuring restrictions, i.e., inaccessible objects and distances above 0.6 km. Under these particular conditions, geodetic techniques based on Electromagnetic Distance Meters (EDMs) or Total Stations (TSs) can provide coordinates with a precision better than 1 cm, but only for a limited number of discrete points. For mass capture, Terrestrial Laser Scanning (TLS) is normally the preferred solution, but long-range instruments are expensive, and drawbacks such as weak return signals and non-automatic target recognition appear. As an alternative, PPh is investigated in the well-controlled area of La Muela in Cortes de Pallas, where images are automatically captured from geodetic pillars using a GigaPan device, processed, and then rigorously compared to TLS point clouds. The results obtained after integrating both techniques into a high-accuracy geodetic reference frame show that PPh and TLS provide similar precision to within approximately 4 cm in the range of 0.6–1.0 km. Therefore, considering cost-effectiveness and ease of use, the proposed method can be considered a low-cost alternative to TLS for long-range deformation monitoring.

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Section: Introductionmentioning

confidence: 99%

Assessment of Panorama Photogrammetry as a Tool for Long-Range Deformation Monitoring

Javadi,

García-Asenjo,

Luján

et al. 2024

Sensors

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“…Techniques for processing point clouds and analyzing the deformations in a 3D format are being developed in the direction of specific algorithm solutions [ 19 , 23 , 44 , 45 , 46 ].…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Measurements for 3D Modeling and Monitoring of Large Buildings Using Terrestrial Laser Scanning and Unmanned Aerial Systems

Nap

CHIOREAN

Cira

et al. 2023

Sensors

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Along with the development and improvement of measuring technologies and techniques in recent times, new methods have appeared to model and monitor the behavior of land and constructions over time. The main purpose of this research was to develop a new methodology to model and monitor large buildings in a non-invasive way. The methods proposed in this research are non-destructive and can be used to monitor the behavior of buildings over time. A method of comparing point clouds obtained using terrestrial laser scanning combined with aerial photogrammetric methods was used in this study. The advantages and disadvantages of using non-destructive measurement techniques over the classic methods were also analyzed. With a building located in the University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca campus as a case study and with the help of the proposed methods, the deformations over time of the facades of that building were determined. As one of the main conclusions of this case study, it can be stated that the proposed methods are adequate to model and monitor the behavior of constructions over time, ensuring a satisfactory degree of precision and accuracy. The methodology can be successfully applied to other similar projects.

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“…The first method used in the current study was terrestrial laser scanning (TLS) [20], which has the advantages of high accuracy in determining the positions of the observed points and a high density of the resulting point cloud [21]. However, the disadvantages, especially in rugged areas, are a higher measurement time, acquisition cost, and especially occlusions [22], resulting in the incompletion of the digital surface model (DSM).…”

Section: Introductionmentioning

confidence: 99%

Methodology and Results of Staged UAS Photogrammetric Rockslide Monitoring in the Alpine Terrain in High Tatras, Slovakia, after the Hydrological Event in 2022

Kovanič

Štroner

Urban

et al. 2023

Land

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There are numerous talus cones that have formed by long-term geological processes and sudden hydrological events in the Small Cold Valley (High Tatras National Park in Slovakia). Frequent hiking trails lead here; therefore, their safeness needs to be monitored due to recent rock avalanches and landslides. A complex methodology for monitoring changes in talus cones was developed to determine the extent, pace, nature, and origin of the morphological changes in the land in this complex high-mountain terrain. Non-contact UAS photogrammetry with SfM-MVS processing was applied as a quick, reliable, and environment-friendly data acquisition method. For proper georeferencing, a network of GCPs and stabilized surveying points were established by terrestrial geodetic surveying. Together with an evaluation of the methodology, the results comparing the actual state of a talus cone in 2018 and 2022 (after the significant hydrological event) are presented. Comparing and analyzing spatial models represented by point clouds, with an accuracy of centimeter level, was obtained. The detected morphological changes reached values in meters. A differential model expresses the distribution of the morphological changes. In conclusion, geodetic and geological knowledge is synthesized to evaluate the phenomena occurring in this territory.

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TLS-Detectable Plane Changes for Deformation Monitoring

Cited by 4 publications

References 29 publications

Assessment of Panorama Photogrammetry as a Tool for Long-Range Deformation Monitoring

Assessment of Panorama Photogrammetry as a Tool for Long-Range Deformation Monitoring

Non-Destructive Measurements for 3D Modeling and Monitoring of Large Buildings Using Terrestrial Laser Scanning and Unmanned Aerial Systems

Methodology and Results of Staged UAS Photogrammetric Rockslide Monitoring in the Alpine Terrain in High Tatras, Slovakia, after the Hydrological Event in 2022

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