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：2009
卷号：XXXVIII-2/W11
出版社：Copernicus Publications
摘要：In recent years, 3D models have been created of many cities around the world. Most of these models are, however, only used for visualization in web frontends or navigation systems. With the rapid progress in the development of sensor systems and algorithms for the interpretation of their measurements, an increasing number of more and more detailed models is going to be available. Such detailed models can, however, not be used directly in many applications because the data sets are too large or because there is information in the model that cannot be handled by the application. The purpose of generalization is therefore to reduce the size and semantic complexity of a model to a level that can be handled by the application without losing relevant information. In order to implement such a highly application-dependent task as a generic service, it is divided into atomic modules. Generalization requires information about the objects and their context they are embedded in. Thus the features present in the data have to be revealed first, before generalization can be applied. Thus, especially with a stronger separation of generalization and feature extraction steps, such a modularization offers great potential for the reusability of components and flexibility in the integration of application-specific components
关键词：Generalization; City Models; 3D; Service; Semantics; Modularization
