街道网矢量数据的渐进式表达与综合
Progressive Representation and Generalization for Vector Data of Street Network
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摘要: 基于平面欧几里得图和抽象胞腔复形理论,提出了街道网矢量数据的渐进式表达模型。引用抽象算子和还原算子定义了街道删除算子和街道还原算子,基于这些算子建立的街道网矢量数据的渐进式表达模型具有隐式的拓扑关系一致性。该模型表明,不同表达间的变化量的累积是有顺序的,生成这些变化量的变化算子的执行也是有顺序的。在渐进式表达模型的框架下,提出了基于有序综合树结构的街道网渐进式综合算法,将地图综合知识融入特定的数据结构,实现了街道网智能化综合。Abstract: A progressive representation model for street networks of vector data was presented based on the theory of plane Euclidean graph and abstract complex cell.Abstraction operator and refinement operator were used define the street elimination operator and street refinement operator.Topological consistency is implicit in the progressive representation model built on such operators.This model shows that the accumulation of changes and the execution of atomic operators that produce these changes both have sequences.A progressive generalization algorithm based on the ordered generalization tree structure was proposed.This algorithm brought both the map generalization knowledge and data structure.Hence,the generalization process can be implemented intelligently in such a way.
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