VISUALIZATION OF UNDERGROUND SPACE INUDATION PREDICTION USING PANORAMIC IMAGES ON MOBILE TERMINALS

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  • 360°パノラマ画像を用いた地下空間浸水予測の携帯端末での可視化

Abstract

 Recently, due to the inundation damages in urban areas caused by frequent torrential rainfalls in short-time, the risk of flooding in the underground malls in urban areas is also increasing. Analysis of groundwater flooding damage predicted from the rainfall situation is progressing. However, the method of communicating predicted risk of inundation to the general public in the target underground space is unresolved. This paper proposes a method to display the predicted depth of flooding with graphical 3D CG (Computer Graphics). Distribution of 3D data and rendering of CG increase the load on calculation and communication at the terminal, so the server generates an all-around panoramic image matched with the user's position and distributes it as HTML (Hyper-Text Markup Language) for normal web access in the proposed method. This method makes it easier to understand the predicted inundation situation, and not only it can be expressed from the first-person perspective but also it is possible to check the situation interactively by looking around the surroundings. This paper shows the effectivity of our method by experimental implementation at an actual railway station facility in underground and inundation simulation results based on assumed heavy rainfalls of past data in Osaka city.

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