Efficient visualisation of 3D city models in various scales is one of the pivotal techniques to support applications in mobile and Internet environments. In this paper, a framework is proposed to visualise online 3D city models using Internet Browsers without plugins. The City Geography Makeup Language (CityGML) and Extensible 3D (X3D) are used to represent and present the 3D city models. Then,...

A conceptual framework is proposed that defines the most appropriate 3D visualisations for different types of natural disasters in urban environments. Based on the disaster type, the needed level of detail for a 3D model is derived, which is then linked to the time needed to process the data and obtain this level of detail. The levels of detail are compliant with the 3D international standard C...