| Fast Web - Based Data Transmission |
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| 作者单位： | Wei Zukuan,Bae Haeyoung(Department of Computer Science Engineering, Inha University,);Kim Jaehong(Department of Computer Science, Youngdong University, Youngdong, Korea)
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| 摘 要： | ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｒｎｅｔ,ａｇｌｏｂａｌｎｅｔｗｏｒｋｏｆｃｏｍｐｕｔｅｒｓｃｏｎｎｅｃｔｅｄｔｈｒｏｕｇｈｃｏｍｍｕｎｉｃａｔｉｏｎｄｅｖｉｃｅｓ,ｐｒｏｖｉｄｅｓＧＩＳｕｓｅｒｓａｎａｃｃｅｓｓｔｏｒｅｍｏｔｅｇｅｏｇｒａｐｈｉｃｄａｔａ .Ｔｈｅｗｅｂ ｂａｓｅｄＧＩＳ ,ａｋｉｎｄｏｆｉｎｔｅｒｎｅｔ ｂａｓｅｄＧＩＳｔｏｏｌｆｏｒｔｈｅａｃｃｅｓｓｔｏｒｅｍｏｔｅｇｅｏｇｒａｐｈｉｃｉｎｆｏｒｍａｔｉｏｎ ,ｉｓｐｒｏ ｐｏｓｅｄｉｎｔｈｉｓｐａｐｅｒ.Ｎｏｗａｄａｙｓ ,ｔｈｅｗｅ…
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Fast Web-Based Data Transmission |
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| Authors: | Wei Zukuan Kim Jaehong Bae Haeyoung |
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| Abstract: | Since web-based GIS processes large-size spatial geographic information on internet, we should try to improve the efficiency of spatial data query processing and transmission. This paper presents two efficient methods for this purpose: division-transmission and progressive-transmission methods. In division-transmission method, a map can be divided into several parts, called “tiles”, and only tiles can be transmitted at the request of a client. In progressive-transmission method, a map can be split into several phase views based on the significance of vertices, and a server produces a target object and then transmits it progressively when this spatial object is requested from a client. In order to achieve these methods, the algorithms, “tile division”, “priority-order estimation” and the strategies for data transmission are proposed in this paper, respectively. Compared with such traditional methods as “map total transmission” and “layer transmission”, the web-based GIS data transmission, proposed in this paper, is advantageous in the increase of the data transmission efficiency by a great margin. |
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| Keywords: | spatial data transmission spatial query processing web based GIS geographic information system spatial database |
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