En kısa yol ve en az riskli yol algoritmalarının 2B ve 3B görselleştirilmiş çok katlı binalarda karşılaştırılması

Thanks to the development of technology, navigation devices come into many people's life. In daily life, people use Global Positioning Systems (GPS) to find their ways in both familiar and unfamiliar outdoor spaces. For indoor spaces, this technology is not popular as outdoor spaces. Because, GPS technology is limited since the radio signals can not penetrate through walls of the buildings. So other positioning techniques are used to determined the positioning and navigation in indoors. In this master thesis, the positioning techniques for indoor spaces are defined and the combination of indoor positioning techniques are explained. Since one of the positioning technique is not enough for positioning in a indoor space that's why combination of techniques gives us so much better solutions to this problem. After the positioning techniques and their combinations are explained, the optimal routes for an indoor space are determined and Dijkstra's algorithm and least risk path algorithm are explained in details with their examples. The aim of this thesis is to compare these two algorithm according to the different 2D and 3D visualizations of the floors. The case study building is chosen as "Plateau-Rozier" building of Gent University. Ground floor and first floor are modelled as Geometric Network Model and according to this model these floors are digitized in Sketch Up programme to visualize it 2D and 3D. Than from each node to every node all the single source shortest paths and least risk paths are calculated in C# software, and six routes are selected as a task where the shortest routes and least risk routes differs apparently. Each route consist of a source node and a end node and they have six visualizations to compare. The visualizations are 2D black&white and 2D color, 3D black&white and 3d color with version one, and 3D black&white and 3D color version two. After test is prepared with these routes and visualizations, fifty unfamiliar users are asked by some questions like "Which route is the shortest?", "Which visualization do you prefer for solving a routing problem?", and so on. According to the test, it is proven that people prefer shortest paths than least risk paths and they make their decision based on 2D visualization not 3D.