ENHANCED LOD CONCEPTS FOR VIRTUAL 3D CITY MODELS
ENHANCED LOD CONCEPTS FOR VIRTUAL 3D CITY MODELS
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DOI：
10.5194/isprsannals-ii-2-w1-51-2013
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
J. Benner;A. Geiger;G. Gröger;K. Häfele;Marc-O. Löwner
中科院分区：
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作者：
J. Benner;A. Geiger;G. Gröger;K. Häfele;Marc-O. Löwner
虚拟3D城市模型包含城市对象的数字三维表示，如建筑物，街道或技术基础设施。由于这些模型的大小和复杂性不断增长，一个细节层次（LoD）的概念，有效地支持一个完整的模型划分为不同复杂性的替代模型，并提供元数据，解决信息内容，复杂性和质量的每个替代模型是必不可少的。在简要概述了各种LoD概念之后，本文讨论了3D城市模型的CityGML标准的现有LoD概念，并确定了一些缺陷。基于此分析，开发了一个替代概念，并通过几个示例进行了说明。它首先区分几何细节层次（GLoD）和语义细节层次（SLoD），其次区分内部建筑和其外壳。最后，一个可能的实现的新概念是通过一个UML模型。
Virtual 3D city models contain digital three dimensional representations of city objects like buildings, streets or technical infrastructure. Because size and complexity of these models continuously grow, a Level of Detail (LoD) concept effectively supporting the partitioning of a complete model into alternative models of different complexity and providing metadata, addressing informational content, complexity and quality of each alternative model is indispensable. After a short overview on various LoD concepts, this paper discusses the existing LoD concept of the CityGML standard for 3D city models and identifies a number of deficits. Based on this analysis, an alternative concept is developed and illustrated with several examples. It differentiates between first, a Geometric Level of Detail (GLoD) and a Semantic Level of Detail (SLoD), and second between the interior building and its exterior shell. Finally, a possible implementation of the new concept is demonstrated by means of an UML model.