scholarly journals Using terrestrial laser scanning in inventorying of a hybrid constructed wetland system

2017 ◽  
Vol 76 (10) ◽  
pp. 2664-2671
Author(s):  
Radomir Obroślak ◽  
Andrzej Mazur ◽  
Krzysztof Jóźwiakowski ◽  
Oleksandr Dorozhynskyy ◽  
Antoni Grzywna ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Hot Spots ◽  
National Park ◽  
Laser Scanning ◽  
Treatment Plant ◽  
Terrestrial Laser Scanning ◽  
Technical Documentation ◽  
Education Centre ◽  
Quantitative Changes

Abstract The goal of this paper was to evaluate the possibility of using terrestrial laser scanning (TLS) for inventorying of a hybrid constructed wetland (CW) wastewater treatment plant. The object under study was a turtle-shaped system built in 2015 in Eastern Poland. Its main purpose is the treatment of wastewater from the Museum and Education Centre of Polesie National Park. The study showed that the CW system had been built in compliance with the technical documentation, as differences between values obtained from the object and those given in the design project (max. ± 20 cm for situation and ±5 cm for elevation) were within the range defined by the legislator. It was also shown that the results were sufficiently precise to be used for as-built surveying of the aboveground elements of the CW system. The TLS technique can also be employed to analyse quantitative changes in object geometry arising during long-term use (e.g. landmass slides or erosion), the identification of which can help in selecting the hot-spots at risk of damage and thus restore the object to its original state as well as prevent new changes.

scholarly journals The potential to characterize ecological data with terrestrial laser scanning in Harvard Forest, MA

2018 ◽  
Vol 8 (2) ◽  
pp. 20170044 ◽  
Author(s):  
D. A. Orwig ◽  
P. Boucher ◽  
I. Paynter ◽  
E. Saenz ◽  
Z. Li ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Forest Canopy ◽  
Census Data ◽  
Forest Ecology ◽  
Terrestrial Laser Scanning ◽  
Adelges Tsugae ◽  
Ecological Data ◽  
Harvard Forest ◽  
The Impact

Contemporary terrestrial laser scanning (TLS) is being used widely in forest ecology applications to examine ecosystem properties at increasing spatial and temporal scales. Harvard Forest (HF) in Petersham, MA, USA, is a long-term ecological research (LTER) site, a National Ecological Observatory Network (NEON) location and contains a 35 ha plot which is part of Smithsonian Institution's Forest Global Earth Observatory (ForestGEO). The combination of long-term field plots, eddy flux towers and the detailed past historical records has made HF very appealing for a variety of remote sensing studies. Terrestrial laser scanners, including three pioneering research instruments: the Echidna Validation Instrument, the Dual-Wavelength Echidna Lidar and the Compact Biomass Lidar, have already been used both independently and in conjunction with airborne laser scanning data and forest census data to characterize forest dynamics. TLS approaches include three-dimensional reconstructions of a plot over time, establishing the impact of ice storm damage on forest canopy structure, and characterizing eastern hemlock ( Tsuga canadensis ) canopy health affected by an invasive insect, the hemlock woolly adelgid ( Adelges tsugae ). Efforts such as those deployed at HF are demonstrating the power of TLS as a tool for monitoring ecological dynamics, identifying emerging forest health issues, measuring forest biomass and capturing ecological data relevant to other disciplines. This paper highlights various aspects of the ForestGEO plot that are important to current TLS work, the potential for exchange between forest ecology and TLS, and emphasizes the strength of combining TLS data with long-term ecological field data to create emerging opportunities for scientific study.

scholarly journals An Alternative Method for Long-Term Monitoring of Thai Historic Pagodas Based on Terrestrial Laser Scanning Data: A Case Study of Wat Krachee in Ayutthaya

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Peerasit Mahasuwanchai ◽  
Chainarong Athisakul ◽  
Phasu Sairuamyat ◽  
Weerachart Tangchirapat ◽  
Sutat Leelataviwat ◽  
...  
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Terrestrial Laser Scanning ◽  
Point Cloud Data ◽  
Cloud Data ◽  
Long Term Monitoring ◽  
Term Monitoring

This article presents an alternative method for the long-term monitoring of heritage pagodas in Thailand. In this method, terrestrial laser scanning (TLS) is used in combination with permanent survey markers. The Wat (temple) Krachee in the Ayutthaya Province of Thailand was chosen as a case study. This temple has several fantastic elements, including an inverted bell-shaped pagoda, two intertwined trees growing within it, and a chamber inside the pagoda. The preservation team working on the pagoda encountered a challenging problem and faced a decision to trim or not to trim the tree since it has a long-term effect on the pagoda’s structural stability. A high-accuracy terrestrial laser scanner was used to collect three-dimensional point cloud data. Permanent survey markers were constructed in 2018 to be used in long-term monitoring. The 3D surveying of the temple and the monitoring of the pagoda were carried out in five sessions during a period ending in 2020. A point cloud data analysis was performed to obtain the current dimensions, a displacement analysis, and the pagoda leaning angle. The results revealed that the terrestrial laser scanner is a high-performance piece of equipment offering efficient evaluation and long-term monitoring. However, in this study, permanent survey markers were also required as a benchmark for constraining each monitoring session. The 3D point cloud models could be matched with the assumption model elements to evaluate the damaged shape and to determine the original form. The significant elements of an inverted bell-shaped pagoda were investigated. Trimming the tree was found to cause the leaning angle of the pagoda to decrease. An equation was developed for predicting the leaning angle of the Wat Krachee pagoda for preservation and restoration planning in the future. From the results of this study, it is recommended that periodic monitoring should continue in order to preserve Thai pagodas in their original forms.

scholarly journals Monitoring of spruce stands in the Czerwona Woda river catchment of the Stołowe Mountains National Park

2019 ◽  
Vol 61 (1) ◽  
pp. 90-95
Author(s):  
Paweł Strzeliński ◽  
Mieczysław Turski
Keyword(s):  
Water Resources ◽  
Research Program ◽  
National Park ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
National Forest ◽  
Surface Imaging ◽  
River Catchment ◽  
Spruce Stands ◽  
The Impact

Abstract In the spring of 2017, Stołowe Mountains National Park started a research program related to the protection of water resources. The research program was started because of, among others, the growing problems of water resources and the dying of spruce trees. One of the projects commissioned by the Park was ‘Monitoring the impact of renaturisation and hydrological status on changes in the biomass of trees and stands’. The monitoring covered spruce stands growing along the main watercourse of the Park (the Czerwona Woda). As a part of the study, three rectangular surfaces (from 0.45 to 0.50 ha) and 10 circular areas (0.04 ha each) were established. On fenced rectangular surfaces, 10 model trees were selected using the Draudt method. They were monitored using hemispheric cameras (changes in crowns), dendrometers (changes in the circumference of stems) and minirhizotronami (changes in the root layer). In addition to the measurements of all the trees on the surface, imaging with terrestrial laser scanning and hemispherical images was done. The data and results presented in this work were created as a result of the implementation of a project financed from funds related to the forestry fund of the State Forests National Forest Holding.

scholarly journals THE EXPERIENCE IN USING LASER SCANNING AND BUILDING INFORMATION MODELING FOR ENGINEERING DATA MANAGEMENT DURING THE LIFE CYCLE OF AN INDUSTRIAL OBJECT

2021 ◽  
Vol 26 (1) ◽  
pp. 57-67
Author(s):  
Anzhelika A. Sharafutdinova ◽  
◽  
Michael Ja. Bryn ◽  
Keyword(s):  
Life Cycle ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Information Modeling ◽  
Technical Documentation ◽  
Existing Structures ◽  
Operation Process ◽  
Industrial Object ◽  
Building Information ◽  
Project Construction

An industrial object accumulates a great deal of information about its assets throughout its whole development period. This information is provided in the different drawings, passports, regulations, and other technical documentation. One of the common problems of most industrial objects is the disor-ganized storage of technical documentation on assets and its limited access to different industrial ser-vices. This greatly complicates the retrieval of information about the assets to ensure the steady opera-tion of the industrial object. As a consequence, one of the ongoing important tasks becomes the crea-tion of a unified source of up-to-date information about the object’s assets and the facilitation of the access to that data for all the participants of the project, construction, and operation process. Exactly these issues are tackled in the article alongside with the solutions based on using BIM and terrestrial laser scanning. This article also describes the types of BIM and detailed differences between them, the methods to form a BIM, as well as how the methods change at different stages of the life cycle. As well, the typology of tasks for which BIM solutions are applicable. TLS technology is described as a source of initial data for the formation of BIM. This article describes the results of the combined use of BIM and TLS at the stages of design, construction, and operation of an industrial object based on the implemented project. The article provides the result of clash detection in design documentation. The result of clash detection between designed and existing structures is also given. The article also provides the deviations at the construction stage of industrial objects, which were discovered. The ac-quired results demonstrated the effectiveness of using terrestrial laser scanning and BIM in engineering solutions.

scholarly journals Use of Terrestrial Laser Scanning Technology for Long Term High Precision Deformation Monitoring

Sensors ◽  
2009 ◽  
Vol 9 (12) ◽  
pp. 9873-9895 ◽  
Author(s):  
Rok Vezočnik ◽  
Tomaž Ambrožič ◽  
Oskar Sterle ◽  
Gregor Bilban ◽  
Norbert Pfeifer ◽  
...  
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Deformation Monitoring

scholarly journals A TERRESTRIAL LASER SCANNING MEASUREMENT STATION TO MONITOR LONG-TERM STRUCTURAL DYNAMICS IN A BOREAL FOREST

2020 ◽  
Vol XLIII-B1-2020 ◽  
pp. 27-31 ◽  
Author(s):  
M. Campos ◽  
P. Litkey ◽  
Y. Wang ◽  
Y. Chen ◽  
H. Hyyti ◽  
...  
Keyword(s):  
Time Series ◽  
Boreal Forest ◽  
Data Acquisition ◽  
Laser Scanning ◽  
Time Series Data ◽  
Time Window ◽  
Laser Scanner ◽  
Terrestrial Laser Scanning ◽  
Series Data

Abstract. This work presents a data acquisition framework and the technical details of a permanent terrestrial laser scanning (TLS) measurement station for high spatial and temporal resolution forest observation that was developed in the Finnish Geospatial Research Institute. The TLS measurement station was established to provide hyper-temporal time series of three-dimensional point cloud data for long term monitoring of a boreal forest. Time series data acquisition framework consists of regular 14-minute scans performed by a RIEGL VZ-2000i laser scanner in every 30 minutes, resulting in the collection of 48 scans per day. The entire framework includes the setting up of the laser scanner, the initialization of daily project, the scanning data acquisition over a preset time window, the storage management of the collected data at a local measurement computer, and the transfer of data from the measurement computer to network-attached storage (NAS) for further data processes. The operability of the proposed TLS measurement station was first piloted at a test area of about 32,500 m2 in Southern Finland (60°09'N, 24°32'E). A set of several long monitoring experiments were performed over the whole growing season from the beginning of April to the end of October in 2019. As preliminary results, the time series outputs have captured detailed information on the phenological changes in the test site with sub-centimetre accuracy. For instance, it was possible to visualize plant dynamics phenomena, such as the sprouting of leaves in spring and their falling in autumn.

On the accuracy requirements of terrestrial laser scanning for solving engineering and geodetic tasks using BIM

2021 ◽  
Vol 974 (8) ◽  
pp. 2-12
Author(s):  
A.A. Sharafutdinova ◽  
M.J. Bryn
Keyword(s):  
Life Cycle ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Information Modeling ◽  
Digital Information ◽  
Mean Square ◽  
Technical Documentation ◽  
Accuracy Requirement ◽  
The Mean ◽  
Mean Square Errors

Terrestrial laser scanning and digital information modeling are increasingly practiced every year to solve application tasks at various stages of the industrial facility’s life cycle. In this regard, the task of formulating the requirements for the accuracy of performing terrestrial laser scanning for the subsequent forming digital information models becomes more and more calling. In this article we analyzed the types of engineering and geodetic works by which engineering tasks are solved at various stages of the industrial facility’s life cycle in order to create an accuracy requirement. An analysis of the regulatory and technical documentation that specifies doing these works was also made. Basing on it, the relationship between the measurement accuracy characteristics specified in the regulatory and technical documentation (design, construction and operational) and the mean square errors in determining the position of points is described. The authors propose a scheme for transition from the characteristics of the measurements accuracy to the mean square errors of determining the position of points for each type of engineering and geodetic work. The results of this study can be used at planning terrestrial laser scanning of industrial facilities. Basing on the above requirements for the accuracy of the geodetic work, it is possible to formulate a methodology for carrying out each stage of the TLS technological scheme.

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