期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 4
出版社：Copernicus Publications
摘要：During the cartographic generalisation process, geographic objects cannot just be considered one by one. The way objects are processed clearly depends on their spatial context. In this paper, we first study the nature of spatial context encountered during map generalisation. We differentiate three kinds of relations that an object can have with its environment: being part of a significant group, being in a particular area, being in relation with 'same-level' surrounding objects. We also address the issue of scale- dependency related to spatial context. Then, we study how to represent context-related knowledge in a knowledge-based approach of cartographic generalisation. We discuss several aspects of the representation of objects' spatial context in a geographic data model dedicated to map generalisation: explicit representations of high-level objects, fuzzy representation of objects and relations, multi- scale representation of objects and relations, spatialisation of relations. We also study how context appears in the rules expressed by cartographers to describe the generalisation process: it can be used to express exceptions, to classify typical operations to be done, or to express constraints on the final result
