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Efficient Data Transmission Using Map Generalization On Client - side Web GIS
양신(Chen LIANG),이충호(Chung-Ho LEE),위조관(Zu-Kuan WEI),배해영(Hae-Young BAE) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅰ
Recently researches have been made on the client-side Web GIS, which can lessen the load of a sever and provide users with interactive geographic information. However, the initial delay is the mam drawback because of a high volume of geographic data and because the server does not associate spatial features with the map scale. Even when a complex spatial object is too small to be distinguished from a point by the naked eyes, its complete data will be transmitted. This paper proposes a new efficient schema to reduce the response time and increase transmission efficiency. Briefly speaking, “Transmit what can be seen” is the main idea. By exploiting the generalization algorithm, the proposed method allows the sever to extract readable features from objects according to the display scale. Meanwhile, increasingly detailed map will be cached on the client. Therefore this method will contribute to the transmission efficiency of Web GISs.