Uso da grade canadense na determinação de medidas em imagens provenientes da câmara Zeiss TRb 60/24

Abstract

In order to survey information about the use of the Canadian Grid applied to the images generated by the ZEISS TRb 60/24 camera, the Geomatic was used as a scientific ground to study the assessment of dimensions in oblique images of this sensor. ZEISS TRb 60/24 camera is used by 1°/10° Aviation Group - Tactical Recognition Squadron of the Brazilian Air Force, at Santa Maria Air Base. With the RA-1 aircraft equipped with that camera, there was a photographic survey of thirteen buildings within the area of the UFSM campus, in five different heights of flight. After studies about the geometry of the oblique photography and about the process of construction of a reference grid, it was used the method presented by Disperati (1995) and it was possible the construction of a Canadian Grid appropriated to the parameters of the images from the sensor ZEISS TRb 60/24. There was the measures’ determination of the thirteen targets, length and width, and analyzed both the accuracy of them, comparing them to measurements performed by a Total Station, this measures were taken as real. The method presented by Disperati (1995) was adequate, according to the statistical results. The analysis showed error’s rates by each height of flight and for the grid in general, whose final average absolute error was 4.21% with a standard deviation of 3.49%.