Impactos dos pontos de apoio na acurácia posicional de aerolevantamentos.
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Tipo
TCC
Data de publicação
2021-12
Periódico
Citações (Scopus)
Autores
Nakamura, Diego Tatsuo
Carnevale, Igor Militão
Mattos, Ricardo Pinheiro
Carnevale, Igor Militão
Mattos, Ricardo Pinheiro
Orientador
Pamboukian, Sergio Vicente Denser
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Resumo
Os avanços na tecnologia promoveram mudanças em diversas áreas. Na topografia esse panorama não foi diferente, promovendo a eficiência e digitalização dos processos. A tecnologia recém implantada na topografia é utilização de Aeronaves Remotamente Pilotada em conjunto do Global Navigation Satellite System (GNSS) para a realização de levantamentos aerofotogramétricos. Porém, essa tecnologia ainda possui limitações quanto à sua acurácia quando comparada com métodos tradicionais. Apoiando os avanços tecnológicos e conhecendo suas limitações, o objetivo deste artigo é realizar um estudo sobre o impacto dos pontos de apoio na acurácia posicional desse tipo de levantamento, considerando fatores como a quantidade de pontos e a sua distribuição no terreno, para o melhor entendimento da comunidade científica, visto que esse tema é pouco abordado pela comunidade. Para realizar o experimento, foi realizado um aerolevantamento no campus de Alphaville da Universidade Presbiteriana Mackenzie, utilizando-se de dois voos cruzados com altitude de 60 metros e 44 pontos de apoio. Para o processamento dos dados obtidos, foi utilizado o software Agisoft Metashape Pro apoiado por scripts em Python para a automatização dos processos. Entre os principais resultados obtidos é notório que, a partir da utilização de 3 pontos de controle, o erro total do projeto é reduzido de maneira relevante, principalmente quando distribuídos de maneira dispersa, abrangente e homogênea. Conclui-se que, ao realizar a distribuição dos pontos de apoio, é necessário atentar-se para a dispersão, abrangência e homogeneidade dos pontos, além de as possíveis interferências durante a coleta.
Advances in technology have promoted changes in several areas, in topography this panorama wasn't different, promoting efficiency and digitalization of processes. The technology recently deployed in the topography is the use of Remotely Piloted Aircraft in conjunction with the Global Navigation Satellite System to perform aero photogrammetric surveys, but this technology still has limitations in its accuracy when compared to traditional methods. Supporting the technological advances and knowing its limitations, the objective of this paper is to conduct a study about the impact of the ground control points in the positional accuracy of this kind of survey, considering factors such as the number of points and their distribution on the ground, for the better understanding of the scientific community since this subject is little discussed by the community. To carry out the experiment an aero survey was performed at the Alphaville campus of Mackenzie Presbyterian University, using two cross flights with an altitude of 60 meters and 44 ground control points. To process the data obtained the Agisoft Metashape Pro software was used, supported by Python scripts for the automation of the processes. Among the main results obtained with the use of 3 control points the total error of the project is reduced significantly, especially when distributed in a disperse, comprehensive and homogeneous way. It is concluded that when performing the distribution of the ground control points it is necessary to pay attention to the dispersion, comprehensiveness, and homogeneity of the points, besides paying attention to possible interferences during the sampling.
Advances in technology have promoted changes in several areas, in topography this panorama wasn't different, promoting efficiency and digitalization of processes. The technology recently deployed in the topography is the use of Remotely Piloted Aircraft in conjunction with the Global Navigation Satellite System to perform aero photogrammetric surveys, but this technology still has limitations in its accuracy when compared to traditional methods. Supporting the technological advances and knowing its limitations, the objective of this paper is to conduct a study about the impact of the ground control points in the positional accuracy of this kind of survey, considering factors such as the number of points and their distribution on the ground, for the better understanding of the scientific community since this subject is little discussed by the community. To carry out the experiment an aero survey was performed at the Alphaville campus of Mackenzie Presbyterian University, using two cross flights with an altitude of 60 meters and 44 ground control points. To process the data obtained the Agisoft Metashape Pro software was used, supported by Python scripts for the automation of the processes. Among the main results obtained with the use of 3 control points the total error of the project is reduced significantly, especially when distributed in a disperse, comprehensive and homogeneous way. It is concluded that when performing the distribution of the ground control points it is necessary to pay attention to the dispersion, comprehensiveness, and homogeneity of the points, besides paying attention to possible interferences during the sampling.
Descrição
Palavras-chave
imagens adquiridas por drones , topografia de alta resolução , mapeamento digital , aerofotogrametria , drone-acquired imagery , high-resolution topography , digital mapping , aerolevantamento