Haizhong Qian

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CityGML is a universal information model that used to represent 3D city model. Constitution and characters of CityGML is analyzed in this paper, based on which data structure is designed in parsing and visualization of CityGML file. DOM (Document Object Model) is used in parsing CityGML file, Time index model is established based on summarizing(More)
Spatial clustering is important to the application of artificial intelligence in spatial information system. After introducing clustering's basic concept, some shortcomings of current clustering algorithms were analyzed, and the steps of improving on them were given as the following. First, a way of transforming vector data to grid was presented, and a(More)
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