| Summary: | 碩士 === 國立臺灣大學 === 生物產業機電工程學研究所 === 89 === Precision farming is a new agricultural technology. It includes many scientific operation procedures. In the past, there are several ways to obtain the field information such as direct measurement, aerial photography and satellite images. This research developed a new method to acquire the field information and then used this information for spatial mapping. By integrating the global positioning systems, electronic compass and stereo vision, we could grab the images and calculate the absolute coordinate in the real scene. A software was implemented with functions including data input, coordinate transformation, image processing, GIS map output and database management. Experiments were performed to evaluate the accuracy of the global positioning systems. The accuracy of the AgGPS 132 receiver with differential correction was better than 1.5 m. The accuracy of the stereo vision system was within 2.38 m for object in a distance of 100 m. The accuracy of the spatial mapping systems was also tested, the measurement range could reach 55 m when the error was restricted to within 3 m. Finally, spatial mapping system was applied to construct the map of An-Kang farm of NTU and experimental field for precision farming at TARI. The field information integrated spatial coordinates with multiple images in map layers, which allows for retrieval and reconstruction of spatial coordinates of objects in the field.
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