2013
Authors
Dolores Robles Ortega, MD; Ortega, L; Coelho, A; Feito, F; de Sousa, A;
Publication
JOURNAL OF URBAN PLANNING AND DEVELOPMENT-ASCE
Abstract
The growing demand for virtual urban models in emerging areas of interest has promoted a variety of techniques for automating the creation of virtual scenes with a high level of realism. However, visualization is not always the only aim in many applications. Increasingly, urban systems are also required for management, analysis, or interaction with very different types of information. Three-dimensional (3D) urban entities should maintain neighbor relations, and being inserted in a geospatial database in order to enable associative queries, one of the most important features associated with 3D urban geographic information system (GIS). Additional challenges are found when these three-dimensional models are implemented in web-based systems. This paper proposes a method for automatic modeling of buildings and street surfaces of entire real cities by combining computer graphics, computational geometry, and GIS techniques. The sources of information employed are two-dimensional (2D) GIS and its associated digital elevation models (DEMs) in order to provide real terrain features. The virtual environment supports web-based navigation and data interaction. The case study was performed in Jaen, Spain, a hilly city with more than 1,000 blocks of buildings. The 3D city model was generated using the public data provided by the general cadastral office of Jaen and the DEM information of this area. The topological relations between the geometric urban entities were inserted in the spatial database and the graphics and thematic information could be accessed through the Internet. All these features are highly desirable for decision making in urban planning. DOI: 10.1061/(ASCE)UP.1943-5444.0000131. (C) 2013 American Society of Civil Engineers.
2009
Authors
Pedro Miguel Moreira; Luis Paulo Reis; A. Augusto de Sousa
Publication
GRAPP 2009 - Fourth International Conference in Computer Graphics Theory and Applications, pp.137-146, Lisboa, Portugal
Abstract
2007
Authors
José Martins; Jorge Silva; A. Augusto de Sousa
Publication
15 EPCG - 15º Encontro Português de Computação Gráfica, Porto Salvo, Portugal
Abstract
2011
Authors
José Carlos Miranda; Xenxo Alvarez; João Orvalho; Diego Gutierrez; Augusto Sousa; Verónica Orvalho
Publication
SBIM'11 - Eighth Eurographics Symposium on Sketch-Based Interfaces and Modeling, Vancouver, Canadá
Abstract
2006
Authors
Alexandre Carvalho; Cristina Ribeiro; A. Augusto de Sousa
Publication
IADC 2006 - 2nd International Advanced Database Conference, San Diego, Estados Unidos América
Abstract
2008
Authors
Alexandre Carvalho; A. Augusto de Sousa; Cristina Ribeiro
Publication
Information Visualization - Information Visualization, vol.7, no.3, pp.265-274
Abstract
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