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Khám phá Độ phân giải tối ưu không gian cho Hình ảnh vệ tinh: Trường hợp nghiên cứu khu vực ven biển Các nhà nghiên cứu về địa lý quan tâm nhiều trong các vấn đề của quy mô và độ phân giải, và ảnh hưởng mạnh mẽ này có thể có trên các kết quả phân tích các mô hình không gian (Harvey, 1968; Stone, 1972; Goodchild và Quattrochi năm 1997). Các vấn đề về quy mô thường phát sinh từ việc không biết kích thước đơn vị tối ưu cho một khu vực nghiên cứu, trong khi MAUP (sửa. | CHAPTER SEVEN Exploring the Optimum Spatial Resolution for Satellite Imagery A Coastal Area Case Study Chul-sue Hwang and Cha Yong Ku 7.1 INTRODUCTION Researchers in geography are much interested in issues of scale and resolution and the strong influence these may have on the results of analyses of spatial patterns Harvey 1968 Stone 1972 Goodchild and Quattrochi 1997 . Issues of scale usually arise from not knowing the optimal unit size for a study area while MAUP the Modifiable Area Unit Problem one of the fundamental research problems in geographical information science can also be considered to be related to the understanding of the scale for spatial data Openshaw 1984 Fotheringham and Wong 1991 7 GIS and remote sensing have shown active interests in both the operational scale and measurement scale of data. Technological developments in GIS and remote sensing have led to the gradual detailing and elaboration of the measurement scale. In the field of remote sensing for example the 78m resolution Multi-Spectral Scanner MSS data of the 1970s has given way to 30m Thematic Mapper TM data in the 1980s SPOT in the 1990s and 1m IKONOS imagery in the 21st century. Such improvements in the measurement scale will allow for the new understanding of geographical phenomena that could not be measured at the previous scales. Changes of the ground resolution of satellite imagery have modified the inherent characteristics of imagery due to the scale effect Goodchild and Quattrochi 1997 . Therefore researchers have to select the image with the optimum resolution among the satellite imagery at diverse resolutions at which a specific geographical phenomenon can be understood more effectively. In order to explore the optimum resolution the objective procedures or indices must be designed for the image characteristics at different resolutions. They should be able to represent the changes in image characteristics that occur at different resolutions. The aim of the present study is to .
