Hye Young Kang

Developing CityGML Indoor ADE to Manage Indoor Facilities

In recent years research interests in 3D geospatial information have been increased to provide location based services and to develop various 3D urban models used in many fields such as urban planning, and disaster management. Especially, due to increasing the scale and complexity of buildings, many researchers have studied to provide the services such as indoor navigation for disaster. In order to manage complicated indoor spatial information efficiently, it is necessary to develop the indoor spatial data model by extending the developed 3D spatial models which have been developed for outdoor space. Although CityGML (City Geography Markup Language) is an international standard model and it supports five Level of Detail for spatial data of urban areas, it is limited to represent and manage indoor facilties in indoor space. In this chapter, we have proposed CityGML Indoor ADE (Application Domain Extensions) applied to implement indoor space and indoor facility management applications. CityGML Indoor ADE is composed of two feature models including indoor space feature model representing space features and indoor facility feature model representing indoor facilities in indoor space. We generate the XML schema of the CityGML Indoor ADE presented by UML diagrams and develop a viewer to visualize the XML documents in order to validate the indoor space feature model. As well, we construct the sample data based on indoor facility feature model to demonstrate the usefulness of the model for indoor facility management applications.

Development of an editor and a viewer for IndoorGML

With the growth of building complexity, spatial information services in indoor space is now increasing as important application area of GIS as outdoor space. Based upon this, many studies have been started to research representation methods for 3-D indoor space and connection method between indoor and outdoor. In this research, we developed the editor and viewer based on IndoorGML which defined with international standardization process.

A study on the correlation analysis for connection between IFC and CityGML

Recently, various researches have been attempted to integrate between the building information handling BIM and the spatial information handling GIS. Particularly, some of the researches were progressed to convert the data model between the BIM standard model IFC and the GIS standard model CityGML. However, because characteristics and domains of between the two data models are very different, it is hard to utilize the previous research results yet. Accordingly, in order to obtain the interoperability between BIM and GIS, the characteristics and correlations between IFC and CityGML objects of each LOD were analyzed in this research. Thereupon, with these analysis results as the background, from view point of building information, a correlation mapping was performed between objects of IFC and CityGML. In the future, there are plans to continue this research in order to derive a standard model for the data conversion between the IFC and CityGML.