Web3DGIS for City Models with CityGML and X3D

There is an increasing interest in 3D Geographical Information Systems which leads to the development of web based technologies for visualization, interaction and query of 3D city models. The Open Geographic Consortium developed the City Geography Markup Language as an industry standard for the modeling of city objects. The web 3D Consortium established the eXtendable 3D standard for display of 3D scenes over the internet. This paper presents a Web3DGIS system that loads a cityGML model and convert it to a X3D model. This model can be viewed in the web. Moreover, it also allows the query about attributes and adjacency relationships of features in GIS data sets. For this Web3DGIS it was used X3D, WebGL and X3DOM. Such solution does not require any additional plug-ins or components.