Medições de distâncias horizontais usando-se fotografias aéreas, corrigidas pela triangulação radial e aerosketchmaster
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Data
1978-12
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Yvo de Carvalho
Resumo
ln this study, we tried to verify the validl ty of surveying linear distances through Mechanical Radial Triangulation and Aerosketchmaster and uncorrected photographs, as compared to the classic topographic method. ertical aereal photographs, of a area with lightly sloping topography, with a median slope of 2%, on a scale of 1:16.000, were used. These were corrected via Mechanical Radial Triangulation using the slotted templets method and with the aid of an aerosketchrnaster. The measured alignments were compared diref tly on top of the photographs and it was verified that the distances of the uncorrected photographs were on an average, 5,9% less than the topographic distances. On the other hand, the distances estimated with a grid base (corrected photographs) were 0,18% larger than the topographic distances. The "student" test was applied and was calculated t = - 5,88, which permitted us to conclude that the difference between the topographic measurements and the me! surements of the uncorrected aereal photographs were highly significant.
The "student" test for the topographic measurements, compared with the measurements of the grid base was calculated t = 0,331, and it was concluded that these two methods didn't present a significant difference. A correlation between the survey methods used to measure tbe diStances in 1::.he' aerea.1 'phOtOg:tciphS and those taken from the grid base, and the corresponding linear regression, was made. This showed the possibility of making measurements directly on top of the aereal photographs, un der the conditions cortsidered,as longas the values presented in table x of Figure IX, are used.
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KRAVCHENKO, Anatoly; ROCHA, Jose Sales Mariano da. Medições de distâncias horizontais usando-se fotografias aéreas, corrigidas pela triangulação radial e aerosketchmaster. Anais da Escola de Agronomia e Veterinária, Goiânia, v. 8, n. 1, p. 68-92, jan./dez. 1978. Disponível em: <https://www.revistas.ufg.br/pat/article/view/2302>.