地图图形结构分析与概括研究  

Identification and Generalization of Spatial Structures on Map

作　　者：张青年[1] 

机构地区：[1]中山大学城市与资源规划系,广东广州510275

出　　处：《中山大学学报（自然科学版）》2002年第1期87-90,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助 (4 0 10 10 2 4)

摘　　要：地图图形往往具有一定程度的空间结构特征 ,例如树枝状水系、棋盘状街道网等。这些空间结构特征深刻反映了地理现象的特点和规律 ,是地图图形概括过程中需要突出表现的内容。然而 ,地理数据库中并没有直接存储图形结构信息 ,而是隐含地表示于几何图形要素的空间关系之中。这就要求在地图概括处理之前进行图形结构分析。分析了地图图形结构模式及其识别过程 。There are many structural units on maps,such as dendriform drainage and orthogonal streets.Structural patterns reflect the characteristics of geo-graphical phenomena,thus should be represented on map.However,geo-databases usually do not represent structural entities directly. Instead, they are implied by spatial relationship between elementary geometric entities.In many GIS applications,one needs to generalize elementary graphic features so as to derive scale-reduced data set.In such cases,it is necessary to identify the implied spatial structure,so as to represent the implied spatial structure in generalized data sets.Otherwise the spatial structure may be distorted.The classification and identification of structural patterns of spatial distribution were discussed, and the map generalization method based on structure analysis was explored.

关 键 词：地图图形 模式识别 地图概括 空间结构特征 图形结构 地理数据库 几何图形 

分 类 号：P282[天文地球—地图制图学与地理信息工程]