地图目标移位的面目标变形约束及其处理  

Constraints on the Distortion of Area Objects in the Process of Map Objects Displacement

作　　者：毛建华[1] 

机构地区：[1]上海大学通信与信息工程学院,上海市200072

出　　处：《武汉大学学报（信息科学版）》2008年第3期269-272,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40401050)

摘　　要：在分析地图目标移位及面目标变形一般约束条件的基础上,利用骨架线划分面目标的空间结构层次,并通过制定相关的参数赋值策略,应用有限元方法求解移位过程中的面目标变形。In order to maintain symbols equilibrium and spatial relationship between objects, some unimportant symbols or parts of symbols should be distorted under constraints according to visual graphic resolution thresholds to figure out space competition among map features. And three constraints including position, legible and characteristics are important for the maintenance of symbols equilibrium and spatial relationship, which are discussed in this paper. And the skeleton is introduced to represent area objects figure characteristic, with which area object can be separated to parts hierarchically according to importance in the construct. Then the finite element method is applied to the map objects＇ displacement and distortion. The strategy for the parameters of finite element method is discussed, a case study is followed at the last.

关 键 词：移位 面目标变形 约束条件 有限元 

分 类 号：P283.1[天文地球—地图制图学与地理信息工程]