路网要素多尺度表达目标的层次关系分析  

On Hierarchical Relation Among Road Multi-scale Representations

作　　者：王艳慧[1] 李小娟[1] 刘晓萌[1] 

机构地区：[1]首都师范大学三维信息获取与应用教育部重点实验室

出　　处：《中国图象图形学报》2007年第8期1451-1456,共6页Journal of Image and Graphics

基　　金：国家自然科学基金项目(40471090)

摘　　要：针对目前地理要素多尺度建模的热点问题,剖析构建多尺度空间数据模型的关键技术,以路网要素为例,挖掘地理要素多尺度抽象表达的机理,利用多尺度扩展E-R方法,提炼多尺度抽象表达目标间的各种尺度、层次、语义、映射等层次语义关系,实现GIS中地理要素多尺度概念模型的设计。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.

关 键 词：多尺度表达 多尺度建模 层次语义关系 多尺度扩展E-R方法 

分 类 号：P208[天文地球—地图制图学与地理信息工程]