地图信息自动综合基本问题研究  

Research on Fundamental Theory and Technical Approaches of Automated Map Generalization

作　　者：毋河海[1] 

机构地区：[1]武汉测绘科技大学土地科学学院,武汉市珞喻路129号430079

出　　处：《武汉测绘科技大学学报》2000年第5期377-386,共10页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金!资助项目 ( 4 99710 68);国家测绘局测绘科技发展基金!资助项目 ( 970 10 )

摘　　要：对地图综合的几个基础理论问题和技术方法作了相应的论述 ,提出了以下主要结构化综合的学术论点和方法 :①综合 (抽象与概括 )并不为地图学与GIS所独有 ,而是科学认知的普遍手段 ,因而地图综合就是哲学意义上的抽象概括原理在空间数据处理中应用的一个特例。②地图综合实质的信息变换观。③综合对象的DLM观。④综合算子的再综合 (DLM信息变换类和DCM图形再现类 )的必要性。⑤结构化综合的三级实现模型。This paper concerns only the generalization of geoinformation which is stored in cartographic database or spatial database of GIS.The author's basic opinion is that in cartography and GIS there is a lack of essential and operational theory which could support the automatic generalization in digital environment by computer.The author proposed and implemented the following theoretical approaches to the automatic generalization: Generalization concerns two problems: scientific and technologic.The former investigates “what is the essence of ”,“why the necessity and possibility of”and“what is the object of”;the latter determines“when”,“where”and“how” to carry out corresponding operations .Without true theory there is no possibility to develop correct technical methodology and to make it have universal meaning. “What is the essence of generalization”should be examined from two aspects: philosophic and technologic.From the first aspect to view,generalization is not owned by cartography and GIS themselves,but it is a universal methodology of human cognition.Therefore,from the macroscopic point of view,the carto/geo_genaralization should be considered as a particular situation of application of scientific cognition rules “abstraction / summarization (the synonym of term generalization)”.From the second aspect to view,the author proposed the insist of geo_info transformation as the essence of generalization. What is the object of generalization?The author proposed the DLM view of generalization,i.e.the generalization object is none other than the geo_content of database.The DLM view of generalization is equivalent to model generalization. “When” can be interpreted as object own conditions to be evaluated from the viewpoint of generalization.It can be considered as microconditions. “Where” can be interpreted as object“context”relations to be evaluated from the viewpoint of generalization.It can be considered as mesosituations. “How” involves very abundant connotation:

关 键 词：自动综合 综合模型 算法 地图信息 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P283.1[天文地球—测绘科学与技术]