COMBINED USE OF TERRESTRIAL LASER SCANNER AND UNMANNED AERIAL VEHICLE AS AN EFFECTIVE TOOL FOR FOREST PARAMETERS EXTRACTION

2020 ◽  
Author(s):  
Lampros Papalampros ◽  
Vassilios Tsioukas
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
Parameters Extraction ◽  
Combined Use ◽  
Aerial Vehicle

scholarly journals Combination of Terrestrial Laser Scanner and Unmanned Aerial Vehicle Technology in The Manufacture of Building Information Model

2021 ◽  
Vol 5 (2) ◽  
pp. 520-525
Author(s):  
Sawitri Subiyanto ◽  
Nurhadi Bashit ◽  
Naftalie Dinda Rianty ◽  
Aulia Darmaputri Savitri
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Point Cloud ◽  
Rapid Development ◽  
Laser Scanner ◽  
Information Model ◽  
Terrestrial Laser Scanner ◽  
Building Information Model ◽  
Cloud Data ◽  
Building Information ◽  
Aerial Vehicle

The rapid development of the construction world in Indonesia has led to an increase in supporting technology that is more effective and efficient. The Building Information Model (BIM) technology that begins with the creation of an as-built 3D model, this model describes the existing condition of the building. The Terrestrial Laser Scanner (TLS) method can provide a point cloud with a decent point density, but there are still areas of the building that aren't covered, such as the roof. To be more complete and detailed, additional data is needed using an Unmanned Aerial Vehicle (UAV). The results of the combination of TLS and UAV complement each other so that the results of the point cloud can form more detailed buildings. BIM may be built by combining these two data sets, allowing for the three-dimensional depiction of assets in buildings. The registration results for TLS point cloud data have a fairly good value where the overlap value is 44.9% (minimum 30%), balance is 41.2% (minimum 20%), points < 6mm is 98.9% (minimum 90%). The measurement results using the UAV have an RMSE GCP value of 0.266m and an RMSE ICP of 0.455m. Merging the results of TLS and UAV measurements is done using 3DReshaper software with four align points. The final result of making the BIM model is obtained level of detail (LOD) 3 where room models such as columns, floors, stairs, and walls are well depicted, while asset models such as furniture are also depicted although they are still simple objects.

scholarly journals Use of UAV-Photogrammetry for Quasi-Vertical Wall Surveying

2020 ◽  
Vol 12 (14) ◽  
pp. 2221 ◽  
Author(s):  
Patricio Martínez-Carricondo ◽  
Francisco Agüera-Vega ◽  
Fernando Carvajal-Ramírez
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Vertical Wall ◽  
Laser Scanner ◽  
Point Clouds ◽  
Ground Control ◽  
Terrestrial Laser Scanner ◽  
Control Points ◽  
Ground Control Points ◽  
Aerial Vehicle

In this study, an analysis of the capabilities of unmanned aerial vehicle (UAV) photogrammetry to obtain point clouds from areas with a near-vertical inclination was carried out. For this purpose, 18 different combinations were proposed, varying the number of ground control points (GCPs), the adequacy (or not) of the distribution of GCPs, and the orientation of the photographs (nadir and oblique). The results have shown that under certain conditions, the accuracy achieved was similar to those obtained by a terrestrial laser scanner (TLS). For this reason, it is necessary to increase the number of GCPs as much as possible in order to cover a whole study area. In the event that this is not possible, the inclusion of oblique photography ostensibly improves results; therefore, it is always advisable since they also improve the geometric descriptions of break lines or sudden changes in slope. In this sense, UAVs seem to be a more economic substitute compared to TLS for vertical wall surveying.

3D Data Fusion Using Unmanned Aerial Vehicle (UAV) Photogrammetry and Terrestrial Laser Scanner (TLS)

2018 ◽  
pp. 295-305 ◽  
Author(s):  
Mohamad Aizat Asyraff Mohamad Azmi ◽  
Mohd Azwan Abbas ◽  
Khairulazhar Zainuddin ◽  
Mohamad Asrul Mustafar ◽  
Mohd Zainee Zainal ◽  
...  
Keyword(s):  
Data Fusion ◽  
Unmanned Aerial Vehicle ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
3D Data ◽  
Aerial Vehicle

Numerical Simulation and Experimental Verification of the Deposition Concentration of an Unmanned Aerial Vehicle

2019 ◽  
Vol 35 (3) ◽  
pp. 367-376 ◽  
Author(s):  
Qiang Shi ◽  
Hanping Mao ◽  
Xianping Guan
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Unmanned Aerial Vehicle ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Utilization Rate ◽  
Droplet Deposition ◽  
Aerial Vehicle ◽  
Motion Characteristics

Abstract. To analyze the droplet deposition under the influence of the flow field of an unmanned aerial vehicle (UAV), a hand-held three-dimensional (3D) laser scanner was used to scan 3D images of the UAV. Fluent software was used to simulate the motion characteristics of droplets and flow fields under the conditions of a flight speed of 3 m/s and an altitude of 1.5 m. The results indicated that the ground deposition concentration in the nonrotor flow field was high, the spray field width was 2.6 m, and the droplet deposition concentration was 50 to 200 ug/cm2. Under the influence of the rotor flow field, the widest deposition range of droplets reached 12.8 m. Notably, the droplet deposition uniformity worsened, and the concentration range of the droplet deposition was 0 to 500 ug/cm2. With the downward development of the downwash flow field, the overall velocity of the flow field gradually decreased, and the influence interval of the flow field gradually expanded. In this article, the droplet concentration was verified under simulated working conditions by a field experiment, thereby demonstrating the reliability of the numerical simulation results. This research could provide a basis for determining optimal UAV operating parameters, reducing the drift of droplets and increasing the utilization rate of pesticides. Keywords: Unmanned aerial vehicle (UAV), Aerial application, Downwash flow field, Droplet deposition, Simulation analysis.

scholarly journals Safe Documentation of Historical Monuments by an Autonomous Unmanned Aerial Vehicle

2021 ◽  
Vol 10 (11) ◽  
pp. 738
Author(s):  
Vít Krátký ◽  
Pavel Petráček ◽  
Tiago Nascimento ◽  
Michaela Čadilová ◽  
Milan Škobrtal ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Robotic Systems ◽  
Historical Buildings ◽  
The Czech Republic ◽  
Aerial Vehicles ◽  
Historical Monuments ◽  
Aerial Vehicle ◽  
The Church

The use of robotic systems, especially multi-rotor aerial vehicles, in the documentation of historical buildings and cultural heritage monuments has become common in recent years. However, the teleoperated robotic systems have significant limitations encouraging the ongoing development of autonomous unmanned aerial vehicles (UAVs). The autonomous robotic platforms provide a more accurate and safe measurement in distant and difficult to access areas than their teleoperated counterpart. Through the use of autonomous aerial robotic systems, access to such places by humans and building of external infrastructures like scaffolding for documentation purposes is no longer necessary. In this work, we aim to present a novel autonomous unmanned aerial vehicle designed for the documentation of hardly attainable areas of historical buildings. The prototype of this robot was tested in several historical monuments comprising scanned objects located in dark and hardly accessible areas in the upper parts of tall naves. This manuscript presents the results from two specific places: the Church of St. Anne and St. Jacob the Great in Stará Voda, and St. Maurice Church in Olomouc, both in the Czech Republic. Finally, we also compare the three-dimensional map obtained with the measurements made by the 3D laser scanner carried onboard UAV against the ones performed by a 3D terrestrial laser scanner.

scholarly journals Identification of Water Body Extent Based on Remote Sensing Data Collected with Unmanned Aerial Vehicle

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 338 ◽  
Author(s):  
Przemysław Tymków ◽  
Grzegorz Jóźków ◽  
Agata Walicka ◽  
Mateusz Karpina ◽  
Andrzej Borkowski
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Water Body ◽  
Laser Scanner ◽  
Infrared Camera ◽  
Remote Sensing Data ◽  
Thermal Infrared ◽  
Test Site ◽  
Remotely Sensed ◽  
Remotely Sensed Data ◽  
Aerial Vehicle

The paper presents an efficient methodology of water body extent estimation based on remotely sensed data collected with UAV (Unmanned Aerial Vehicle). The methodology includes the data collection with selected sensors and processing of remotely sensed data to obtain accurate geospatial products that are finally used to estimate water body extent. Three sensors were investigated: RGB (Red Green Blue) camera, thermal infrared camera, and laser scanner. The platform used to carry each of these sensors was an Aibot X6—a multirotor type of UAV. Test data was collected at 6 sites containing different types of water bodies, including 4 river sections, an old river bed, and a part of a lake shore. The processing of collected data resulted in 2.5-D and 2-D geospatial products that were used subsequently for water body extent estimation. Depending on the type of used sensor, the created geospatial product, and the type of the water body and the land cover, three strategies employing image processing tools were developed to estimate water body range. The obtained results were assessed in terms of classification accuracy (distinguishing the water body from the land) and geometrical planar accuracy of the water body extent. The product identified as the most suitable in water body detection was four bands RGB+TIR (Thermal InfraRed) ortho mosaic. It allowed to achieve the average kappa coefficient of the water body identification above 0.9. The planar accuracy of water body extent varied depending on the type of the sensor, the geospatial product, and the test site conditions, but it was comparable with results obtained in similar studies.

scholarly journals ISSUES OFCREATION OF A LARGE-SCALE GEOMORPHOLOGICAL BASE MAP OF MONGOLIA

2019 ◽  
Vol 1 (2) ◽  
pp. 81-88
Author(s):  
Ulziisaikhan Ganbold ◽  
Oyuntsetseg Dash
Keyword(s):  
Earth Sciences ◽  
19Th Century ◽  
Unmanned Aerial Vehicle ◽  
Large Scale ◽  
Laser Scanner ◽  
Topographic Maps ◽  
The Earth ◽  
Geomorphological Map ◽  
Aerial Vehicle ◽  
Mapping Techniques

It is an alternative science, as the geomorphology plays out in a complex geographic, topo-graphic setting in which both the tectonic and climate processes responsible for driving evolution of the topography change in style and intensity. Geomorphology is a relatively young science, growing along with interest in other aspects of the earth sciences in the mid-19th century. While geomorphological development continues to grow steadily today, there is a need to use some advanced theoretical and mapping techniques. This paper is issued to cover the creation of topographic maps with a scale of 1 : 50 000 of geodetic measurements by terrestrial a laser scanner and an unmanned aerial vehicle (UAV) for geomorphological map.

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