Accuracy of waste stockpile volume calculations based on UAV Photogrammetry
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Kuupäev
2023
Kättesaadav alates
Autorid
Künnapuu, Rauno
Kokamägi, Kaupo
Liba, Natalja
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
In environmental supervision, it is necessary to measure waste piles volume to determine
whether the activities of the waste manager comply with the established requirements. The aim
of this research is to determine whether the model, formed from images collected with low-priced
unmanned aerial vehicle (UAV) - not with Real Time Kinematic Global Navigation Satellite System
(RTK GNSS) capability - is sufficiently accurate to carry out waste-related surveying. Data
collection took place in spring 2021 at the Aardlapalu transhipment station in Tartu County. The
objects of the research were an unscreened composting pile and a covered composting pile. In the
fieldwork, terrestrial laser scanning and photogrammetric flight were carried out. The reference
value was the volume of the model formed from the data of laser scan. The volumes of all models
formed by the photogrammetric method were within the permissible difference of 10% provided
by law. The most accurate results were obtained from the covered composting pile with an overlap
of 70% × 70% and 21 ground control points (GCPs). Using these parameters, the absolute error of
the model was 1.48 m³ and the relative error was 0.65%. The most inaccurate results were obtained
from the unscreened composting pile with an overlap of 80% × 80% and 21 GCP-s. The research
confirmed the hypothesis that sufficient accuracy to calculate waste piles volumes can also be
achieved by using a cheaper UAV and camera and with software not specially designed for
photogrammetry, design, and drawing.
Kirjeldus
Received: February 1st, 2023 ; Accepted: June 3rd, 2023 ; Published: July 6th, 2023 ; Correspondence: raunokunnapuu@gmail.com
Märksõnad
3D modelling, digital image, ground control point, mean square error, photogrammetry, articles