Comparação de sistemas imageadores aerotransportados ópticos e LiDAR para quantificação da biomassa em áreas de Cerrado nativo
Nenhuma Miniatura disponível
Data
2021-11-14
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
Currently, remotely manned aerial platforms (RPAS) embedded with imaging sensors form one
of the most desirable and efficient technological sets in the science of remote sensing. Among
all possible applications, land use mapping is the flagship, with emphasis on the analysis of
native vegetation cover and its relationship with the environment. This research aimed to
analyze the woody aerial biomass contained in parcels of native vegetation of the Cerrado
biome, located in the Red River basin, state of Goiás, based on advanced instruments (LiDAR
and optical sensors) aboard manned aerial vehicles (airplane) and unmanned (RPAS fixedwing, eBee Plus RTK/PPK model). The research also included estimates of native vegetation
cover obtained in the field, such as canopy height, number of individuals, percentage of cover
and woody aerial biomass, in order to evaluate the efficiency of imaging systems and sensors.
The resulting digital surface (MDS) and orthomosaic models were analyzed as a function of
accuracy and precision, combining support points and the PPK (Post Processed Kinematic)
system. Comparing the orthorosaics generated with support points and without the PPK system,
with the orthorosaics generated only with the PPK system, both presented the same planimetric
precision, but with improved altimetric precision when the support points were used. For the
Cerradão, the model that best estimated the biomass was the one generated with airborne
LiDAR data with manned flight, statistically significant with [(F(9.50) = 33.17; p < 0.001; R²
= 0.856; SE of the estimate = 0.17 Mg/ha]. For the Dense Cerrado and Cerradão/Dense Forest,
the models were statistically significant with [(F(12.27) = 121.264; p < 0.001; R² = 0.982; SE
estimate = 0.049 Mg/ha] and [(F(7.42) = 23.360; p < 0.001; R² = 0.796; SE estimate = 0.329
Mg/ha], respectively, both using data obtained with LiDAR Airborne with unmanned flight It
is concluded that the use of data obtained with LiDAR and by aerophotogrammetry, from
manned and remotely manned aircraft, cannot replace but complement the conventional method
of field survey, in the case of native vegetation of Cerrado Denso and Cerradão. As the
efficiency in predicting biomass, going from the best to the worst nt, the point cloud obtained
with airborne LiDAR with unmanned flight, airborne LiDAR with manned flight, and with
aerophotogrammetric survey in unmanned flight. For Cerrado Denso and Cerradão, it can be
concluded that all technologies used in this research showed effective results and can therefore
be applied according to the availability of equipment and financial resources.
Descrição
Palavras-chave
Citação
ALVES JÚNIOR, L. R. Comparação de sistemas imageadores aerotransportados ópticos e LiDAR para quantificação da biomassa em áreas de Cerrado nativo. 2022. 280 f. Tese (Doutorado Geografia) - Universidade Federal de Goiás, Goiânia, 2021.