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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Pancheng Wang Chongjun Yang Zhanfu Yu Yingchao Ren |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of Inf. Sci., CAS, Beijing, China (Pancheng Wang; Chongjun Yang; Zhanfu Yu; Yingchao Ren) |
| Abstract | Web Map Service (WMS) provides spatial information to Internet users by map images. Commonly, spatial data are stored as vector data. It is a long job to create map images from vector data. To reduce the time cost, we employ Linux cluster. When a map is requested, coordinates scope that is a rectangle defined with xmin, ymin, xmax, ymax must be specified. We design a load balance algorithm to divide the request rectangles into some sub-rectangles. Each sub-rectangle is sent to a WMS node to produce some sub-maps. The resulting map will be reconstructed by these sub-maps. All these sub-maps are produced in parallel, so less time is spent in producing an entire map. How to split request rectangles is the key problem. First, we present a method to calculate the 2D load weights distribution in the map scope. Second, nodes load abilities are evaluated. Then, the authors present a method for splitting the entire rectangles. This paper also discusses the performance of the algorithm. |
| Starting Page | 2920 |
| Ending Page | 2922 |
| File Size | 391974 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780387422 |
| DOI | 10.1109/IGARSS.2004.1370305 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-09-20 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Rendering (computer graphics) Remote sensing Linux Geographic Information Systems Web server Image databases Spatial databases Laboratories Content addressable storage Web and internet services |
| Content Type | Text |
| Resource Type | Article |
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