Shell model representation as a substitute of LoD3 for 3D modeling in CityGML
CityGML, the OGC standard on 3D City modeling, is widely used in an increasing number of applications. It defines five consecutive Levels of Detail (LoDO to LoD4 with increasing accuracy and structural complexity), in which LoD3 includes all exterior appearances and geometrical details and requires much storage space. In our work, a new LoD is introduced as shell model which is exterior shell of LoD3 model, and the opening objects like windows, doors as well as smaller faQade objects are projected onto walls. In this paper, a user survey is presented. It shows that shell model can give user almost the same visual impression as the LoD3 model. In further, algorithms are developed to extract shell model from LoD3 model. Experiments show that shell model can reduce up t0 90％ storage of the original LoD3 model. Therefore, it can be used as a substitute of LoD3 model for the visualization on small display on one hand. On the other hand, it can be treated as a sub-level of detail (SLoD3) in CityGML, since it keeps almost all the information amount but requires much less storage space.
Shell model 3D building CityGML Generalization user survey
Hongchao Fana Bo Mao Jie Shen Liqiu Meng
Department of Cartography, Techinische Universit(a)t M(u)nchen, Arcisstr. 21, D-80333,Munich,Germany Geoinformatics, KTH, Drottning Kristinas vag 30, SE-100 44 Stockholm, Sweden Kev Laboratory of Virtual Geographic Environment, Ministry ofEducation, Nanjing Normal Universitv, W
国际会议
武汉
英文
187-197
2011-06-26（万方平台首次上网日期，不代表论文的发表时间）