点状地图符号数据结构同化研究
Data Structure Assimilation of Marker Symbol
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摘要: 从点状地图符号的构建和共享角度出发,分析了基于TrueType、图元法以及CAD图块符号等点状地图符号数据结构的优缺点。针对地图符号的图形特征,提出了一种基于路径的点状符号数据结构,给出了TrueType符号、图元符号、信息块符号到基于路径的点状符号同化方法。实验验证了基于路径的点状符号数据结构具有较强的描述能力和较强的扩展性。Abstract: Map symbols have the same origination with geographic data.The advantages and disadvantages of data structures on marker symbols,such as TrueType,Primitive,and CAD block,are analyzed for aim of building and sharing.A data structure on path is proposed to assimilate symbols from TrueType,Primitive and CAD block.The validation tests show that it has strong ability of description and high scalability.
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