文章基本信息

标题：SEMANTIC ASPECTS FOR 3D MODELING
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作者：Mathieu Koehl
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：2000
卷号：XXXIII Part B4 (/1-3)
页码：507-514
出版社：Copernicus Publications
摘要：The modeling of an object, a natural phenomena is a simplification of the real world which is based on hypothesis to be reproduced. A geographic information system is the consequence of a modeling process of the real world. A frequent used scheme in designing geographic information systems contains three hierarchic levels : the geometric, topologic and semantic levels. These three levels correspond to the different aspects which are managed by the system. There is a hard interaction between these three levels. It is particularly important to notice the high correlation between the scale of the geometric information and the detailing grade of the semantic modeling of the objects which can be acquired by measurements. The semantic analysis of a situation and the high relationship between semantic aspect, geometry and topology is used to define "concepts" of the real world to be modeled. These "concepts" exist in infinite forms and depend entirely on the choices which are made by the restriction of the detailing grade. The "concepts" defined in a topographic information system are particularly topographic concepts which have topologic dimension from 0-D to 3- D. All the objects of the system can be classified in a semantic hierarchy. This semantic hierarchy is then used to define rules which can be utilized in the reconstruction process of 3-D objects. This paper shows the concepts of this semantic approach, and the application of this semantic conceptual designing in different examples
关键词：3-D modeling; Semantic; Urban areas; Database; Semi-automatic reconstruction