A new LoD definition hierarchy for 3D city models used for natural disaster risk communication tool

Taking precautions before a disaster to reduce the causalities and losses engendered by natural disasters is relatively cheaper, and more importantly, better than cure. The authors propose a conceptual framework with the consideration of all stakeholders related to the disaster management to have a better risk management, and to guide the design, implementation and integration of the 3D urban modeling tools into disaster risk visualization. In this study, a new indoor LoD hierarchy is proposed for building objects. The LoD definitions of CityGML are only for the external parts of the city structures and the indoor is modeled in one LoD only. Similar to the outdoor definitions of CityGML, the proposed indoor LoD definitions aim to achieve robust definitions. This framework allows visualization in all the possible 3D urban disaster situations.OTB ResearchOTB Research Institute for the Built Environmen

A conceptual framework for 3D visualization to support urban disaster management

In this paper a conceptual framework is proposed, which aims at establishing link between 3D urban models’ characteristics and types of natural disasters. The framework is designed to serve for stakeholders and disaster managers for providing better selection of type of 3D model representations. The paper introduces parameters according to which the types of hazards can be classified. These parameters provide a background to decide on type of model needed. The LoD as defined in CityGML are investigated with respect to needed resolution for a specific data type. The presented framework is tested for visualization of vulnerability due to earthquake risk in Eskisehir, Turkey. The paper concludes with the discussion on advantages and disadvantages of the framework as well as outlining future research.GIS TechnologyOTB Research Institut

Selecting 3D urban visualisation models to support urban disaster management: A rule-based approach

GIS TechnologyOTB Research Institut

Selecting 3D urban visualisation models for disaster management: Fethiye tsunami inundation case

Urban 3D visualisation rarely considers integrated data visualisation in disaster management. In general, such methods should incorporate interoperable approaches and data to avoid duplicating efforts and to reduce costs. To achieve such interoperability, it is important to investigate the link between the types of potential hazards and the needs of the appropriate 3D model. Then again, risk communication is one of the key components for managing tsunami risk. 3-D Visualization of the tsunami inundation has paramount potential for being an effective visual risk communication tool. This paper presents the application of the rule-based approach to derive the relation between the hazard type and the level of detail, for 3D dynamic inundation visualization model for tsunami in Fethiye Bay of Turkish Southern Coast. The 3D urban model features (and the spatial resolution) considered in this approach are compliant with the level of detail (LoD) definitions specified in CityGML.OTB onderzoekOTB Research Institute for the Built Environmen