UDMV16: Eurographics Workshop on Urban Data Modelling and Visualisation

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https://diglib.eg.org/handle/10.2312/2631130

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Browsing UDMV16: Eurographics Workshop on Urban Data Modelling and Visualisation by Subject "I.3.7 [Computer Graphics]"

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    Interactive Low-Cost Wind Simulation For Cities
    (The Eurographics Association, 2016) Rando, Eduard; Muñoz, Imanol; Patow, Gustavo; Vincent Tourre and Filip Biljecki
    Wind is an ubiquitous phenomenon on earth, and its behavior is well studied in many fields. However, its study inside a urban landscape remains an elusive target for large areas given the high complexity of the interactions between wind and buildings. In this paper we propose a lightweight 2D wind simulation in cities that is efficient enough to run at interactive frame-rates, but also accurate enough to provide some prediction capabilities. The proposed algorithm is based on the Lattice-Boltzmann Method (LBM), which consists of a regular lattice that represents the fluid in discrete locations, and a set of equations to simulate its flow. We perform all the computations of the LBM in CUDA on graphics processors for accelerating the calculations.
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    Realistic Urban Road Network Modelling From GIS Data
    (The Eurographics Association, 2016) Nguyen, Hoang Ha; Desbenoit, Brett; Daniel, Marc; Vincent Tourre and Filip Biljecki
    Starting from GIS data, which are sampled and often inaccurate, this paper presents a method to reconstruct urban road surfaces respecting important geometric constraints selected from civil engineering. We propose a mathematical road surface model based upon road axes and properties. In addition, we introduce a process to produce a mesh representing the roads and the terrain so that roads and terrain match. Experiments and compelling results prove the efficiency of our framework.
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    Visualization of Documented 3D Cities
    (The Eurographics Association, 2016) Chagnaud, Clément; Samuel, John; Servigne, Sylvie; Gesquière, Gilles; Vincent Tourre and Filip Biljecki
    Documents whether historical photographs or urban regulations are important for understanding the urban past as well as for urban planning. CityGML is an open standard used to represent 3D structure and thematic information of the cities. In this article, we briefly present how the recent extension to CityGML to represent documents has been integrated to the 4D virtual urban environment. We will then focus on different visualization techniques of documents in this environment and the various metrics used to evaluate them.