designing and implementing a 3D indoor navigation web application

​During the recent years, the need arises for indoor navigation systems for guidance of a client in natural hazards and fire, due to the fact that human settlements have been complicating. This research paper aims to design and implement a visual indoor navigation web application. The designed system processes CityGML data model automatically and then, extracts semantic, topologic and geometric information including stairs plan, indoor spaces usage and how these spaces are connected together, subsequently, the routing graph is created using the extracted information. The CityGML data model, graph analysis and routing have been implemented on the server side by the use of Python programming language and the client side was developed by the web client languages HTML, JavaScript, Jquery and AJAX. 3D building modeling and navigation in 3D indoor space using Cesium virtual globe can be considered as exclusive specifications of the designed architecture. In addition, besides the calculated 3D route, a graphical user interface for visual guidance is offered in the web application. Automatic process on the CityGML data model for graph creation and routing by the developed engine in the current research eliminates the need for any additional software for such calculations. Running on any devices exploits a web browser is another advantage of the designed and implemented web application that make it a cross-platform service for indoor 3D navigation.