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王艳慧1, 李小娟2, 刘晓萌1(1.首都师范大学三维信息获取与应用教育部重点实验室,北京 100037;2.首都师范大学资源环境与GIS北京 市重点实验室,北京 100037)

摘 要
On Hierarchical Relation Among Road Multi-scale Representations


Multi-scale representations for geographical entities is one of the research focuses in the field of multi-scale spatial database. Compared with the traditional GIS model, the essential modeling mechanism and strategies for building a multi-scale data model are explored. Taken the road feature as an example, a detailed description of multi-representatlon elements in the model are provided. This model includes abstract data types and attribute-value domains for geographical features at different scales, as well as the scale, semantic, and mapping hierarchical relations among features. An appropriate multi-scale conceptual model is given in detail with the multi-scale extended E-R method.