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In this paper we analyze the structural properties of four urban street networks in China based on GIS and complex networks theory. We consider the street networks as spatial networks and use the primal approach to turn the GIS data into graph. The urban street networks display similar topological patterns and deviate from random networks and central planned networks, despite the apparent differences...
The database is the basis of environment management information system, with the spatial data and associated attribute data increasing continually, the realization of the attribute database updated dynamically is taken as the core issue and must be resolved urgently. Adopting the component object model of geographic information system(GIS), such as Map Objects, using the database connection technology,...
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