Due to rapid technological improvements, it has become easy to acquire remote-sensing images. Therefore, mapping through remote sensing has become convenient and readily available, which saves time and resources. Nevertheless, some key steps need to be performed during the mapping process,
including line generalization and smoothing. The former involves retaining the key characteristics of the original map, whereas the latter removes any unnecessary points; both procedures improve the quality of the final map. Many different theoretical and methodological approaches to smoothing
and generalization have been proposed by researchers. In this study, we used the Douglas–Peucker method and Topfer and Pillewizer's law to obtain the optimum threshold length. To achieve this threshold, the following were carried out: (1) small-scale line generalization and (2) line
generalization by an intermediate map scale transform. From the line generalization and smoothing process, a boundary line map of Little Okinawa Island was subsequently produced. The results of our study may serve as a valuable tool for future remote-sensing mapping tasks.
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Document Type: Research Article
Department of Geography,Chinese Culture University, Taipei, Taiwan
Department of Natural Resources,Chinese Culture University, Taipei, Taiwan
The Teaching Centre of Natural Science,Minghsin University of Science and Technology, Hsinchu, Taiwan
Publication date: 2012-12-10
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