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Development of a UAV-based system for the semi-automatic estimation of the volume of earthworks

Oluibukun G. Ajayi

Oluibukun G. Ajayi

Department of Surveying and Geoinformatics, Federal University of TechnologyMinna, Nigeria
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Ajayi, Oluibukun G.
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Timothy O. Oyeboade

Timothy O. Oyeboade

Department of Surveying and Geoinformatics, Federal University of TechnologyMinna, Nigeria
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Oyeboade, Timothy O.
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Hassan A. Samaila-Ija

Hassan A. Samaila-Ija

Department of Surveying and Geoinformatics, Federal University of TechnologyMinna, Nigeria
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Samaila-Ija, Hassan A.
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Taiwo J. Adewale

Taiwo J. Adewale

Department of Surveying and Geoinformatics, Moshood Abiola PolytechnicNigeria
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Adewale, Taiwo J.
  
31. Dez. 2020
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Artikel-Kategorie: Original Article
Online veröffentlicht: 31. Dez. 2020
Seitenbereich: 21 - 28
Eingereicht: 27. Juni 2020
Akzeptiert: 27. Okt. 2020
DOI: https://doi.org/10.2478/rgg-2020-0008
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© 2020 Oluibukun G. Ajayi et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Location map of the project site
Location map of the project site

Figure 2

Workflow of the methodology
Workflow of the methodology

Figure 3

Flight plan made from Dronedeploy
Flight plan made from Dronedeploy

Figure 4

Graphical scheme of flight planning
Graphical scheme of flight planning

Figure 5

Workflow of the developed algorithm
Workflow of the developed algorithm

Figure 6

Orthomosaic of the study site obtained from Pix4D
Orthomosaic of the study site obtained from Pix4D

Figure 7

The major stockpile with marked base for volume computation
The major stockpile with marked base for volume computation

Figure 8

Image of the major stockpile contour and volume values
Image of the major stockpile contour and volume values

Pix4D-estimated volume and error of the volume

Pix4D-computed volume [m3] 51 577.17
Error of volume [m3] ±527.61
Relative error [%] 1.02

Estimated volumes and variation of the proposed algorithm from Pix4D

Pix4D-computed volume [m3] 51 577.17
Proposed algorithm volume [m3] 51 157.30
Difference [m3] ±419.87
Relative error of the difference [%] 0.81

Technical parameters of DJI Phantom 4 (Source: DJI (nd))

Technical Data Parameters
Aircraft diagonal size: 350 mm, battery: 1380 g, maximum wind resistance: 10 m/s, maximum flight time: approx. 28 minutes, satellite positioning system: GPS and GLONASS
Intelligent flight battery capacity: 5350 mA h, voltage: 15.2 V, net weight: 462 g, energy: 81.3 W h
Gimbal controllable range: pitch: −90° to +30°, stabilisation(3-axis; pitch, roll, yaw, maximum controllable angular speed: pitch: 90°/s
Camera sensor: 12.4 MP CMOS, lens: FOV 94° 20 mm [35-mm format equivalent] f/2.8 focus at 1, image size: 4000 × 3000
Remote controller Operating frequency: 2.400–2.483 GHz, battery: 6000 mA h LiPo25, operating current/voltage: 1.24@7.4V
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