| Summary: | 碩士 === 國立政治大學 === 地政學系 === 101 === Basic topographic mapping of land to build one of the basic data, providing land conservation, planning, disaster prevention and relief, livelihood and economic construction and other highly commonality map data. Measurement system means more large-scale aerial photography to measure the type of aircraft equipped with cameras to take aerial photography as the source, and according to scale, precision, regional and demand for proper configuration. And at fixed wing UAV UAV (Unmanned Aerial Vehicle) as the basic topographic maps including aerial imagery partial revision and, as the current Minister of the Interior National Mapping Center map one focus of development work, but because of fixed wing UAV payload capacity limited, equipped with a non-image-taking device measuring cameras based, rather than measuring the optical lens type digital camera design due to mechanical, optical and electronic structure of the measurement is not as rigorous design of compact digital cameras, used in high-precision measurement before work must undergo considerable calibration procedures, the study adopted photogrammetry process, and at different rates fixed distance camera calibration parameters are not accurately describe the parameters of the camera when shooting. Therefore, aerial triangulation adjustment are required by law since the rate of beam aerial triangulation adjustment order to improve the results of camera parameter calibration inaccuracies caused by the impact of poor accuracy.
Since the rate of beam method although imprecise camera parameters can be effectively overcome the phenomenon, but the correlation between the parameters and can not be effectively controlled, and therefore the use of aircraft telemetry sensor calibration field with high precision three-dimensional coordinates of the calibration standard for the aircraft after the intake air, like adjustment required control points, and with self-rate bundle solver camera parameters, provide follow-up mission to use aerial and explore its follow nature. The experiments show that on-site calibration camera parameters in the usual empty three-beam method can achieve considerable precision adjustment. Effectively overcome the camera parameters, continue to point to explore the characteristics of the aerial image control information for the bundle adjustment required to empty three control points, and the measured GPS-RTK checklist its precision, its results meet the basic topographic maps adjustment accuracy requirements . After these procedures were effective solver aerial image exterior orientation, the three-dimensional mapping of basic topographic maps, field check points by viewing topographical accuracy.
However affect aerophotogrammetry many factors stereo mapping accuracy, mostly by the high ratio as the base (Base-Height Ratio) and aerial image of the ground to capture images from the GSD (Ground Sample Distance) decision. By increasing the base stereo pair of high precision space intersection than enhance, more detailed image of the ground to take a flexible adjustment of distance and other aerial conditions, making the UAV payload non-measurement-shaped camera aerial missions, from the earlier years of the survey disaster relief and other emergency tasks aerial mapping of the image does not have the use of follow-up, until today, through more detailed ground resolution, higher aerial image overlap and with non-metric cameras calibration conditions, and then through the expedient empty three solvers program, this UAV Air intake like configuration has been able to achieve a considerable degree of measurement graphing capabilities.
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