Performance-improving techniques in web-based GIS

doi:10.1080/13658810412331280202

CORC > 北京大学 > 地球与空间科学学院

	Performance-improving techniques in web-based GIS
	Yang, C ; Wong, DW ; Yang, RX ; Kafatos, M ; Li, Q
刊名	international journal of geographical information science
	2005
关键词	WebGIS performance pyramid hash index multithread cluster cache dynamic data request PROGRESSIVE TRANSMISSION IMAGE COMPRESSION INTEGRATION WAVELETS INTERNET
DOI	10.1080/13658810412331280202
英文摘要	WebGIS (also known as web-based GIS and Internet GIS) denotes a type of Geographic Information System (GIS), whose client is implemented in a Web browser. WebGISs have been developed and used extensively in real-world applications. However, when such a complex web-based system involves the dissemination of large volumes of data and/or massive user interactions, its performance can become an issue. In this paper, we first identify several major potential performance problems with WebGIS. Then, we discuss several possible techniques to improve the performance. These techniques include the use of pyramids and hash indices on the server side to handle large images. To resolve server-side conflicts originating from concurrent massive access and user interactions, we suggest clustering and multithreading techniques. Multithreading is also used to break down the long sequential, layer-based data access to concurrent data access on the client side. Caching is suggested as a means to enhance concurrent data access for the same datasets on both the server and the client sides. The technique of client-side dynamic data requests is used to improve data transmission. Compressed binary representation is implemented on both sides to reduce transmission volume. We also compare the performance of a prototype WebGIS with and without these techniques.; Computer Science, Information Systems; Geography; Geography, Physical; Information Science & Library Science; SCI(E); SSCI; 0; ARTICLE; 3; 319-342; 19
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/254321]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Yang, C,Wong, DW,Yang, RX,et al. Performance-improving techniques in web-based GIS[J]. international journal of geographical information science,2005.
APA	Yang, C,Wong, DW,Yang, RX,Kafatos, M,&Li, Q.(2005).Performance-improving techniques in web-based GIS.international journal of geographical information science.
MLA	Yang, C,et al."Performance-improving techniques in web-based GIS".international journal of geographical information science (2005).