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In recent years, spatial applications have become more and more important in both scientific research and industry. Spatial query processing is the fundamental functioning component to support spatial applications. However, the state-of-the-art techniques of spatial query processing are facing significant challenges as the data expand and user accesses increase. In this paper we propose and implement...
Interpolation is a significant problem in Geographic Information System and many other fields. Kriging interpolation is thought as optimal interpolation which has high quality but time-consuming at the same time. We use Quad-Tree method which is thought as the only suitable method to locate the pixel images in two-dimension to create spatial index. There are mainly three variants of kriging. We mainly...
How to provide cost effective, high performance spatial relation/spatial predicate implementation is one important issue for Internet map server design. To avoid the disadvantages of computational geometry algorithm approach, it proposes one improved method, combined with the rendering engine, which can enhance the filter accuracy. This proposal can record coverage area of border grid cells accurately...
The spatial index method is one critical factor affecting the query performance in the case of web feature service. The R-tree method, which is one popular method used in spatial database, has limitations for web feature service. In this paper, we propose one rasterization spatial index method utilizing AGG as the engine for the mapping between geographic features and image pixels. After illustrating...
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