The fractal theory put forward by American mathematician B B Mandelbrot (1967) supplies an effective approach to solve complex problems. The complex problems in geography have become the main positive
Over the past several decades, no less remarkable than the fast economic advance has been the pollution of water, air and soil all over China. The degradation of environment provides challenge as well
By integrating the merits of the map overlay method and the geographic information system (GIS), a GIS based map overlay method was developed to analyze comprehensively the environmental vulnerability
The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML based Web GIS service. Based on these models, th
J2EE(Java 2 Platform ,Enterprise Edition) is a kind of architecture that simplifies the development ,design and management of multilevel enterprise solution. The spatial middlewares based on J2EE can