Cookies Policy
The website need some cookies and similar means to function. If you permit us, we will use those means to collect data on your visits for aggregated statistics to improve our service. Find out More
Accept Reject
  • Menu
Publications

Publications by Augusto Sousa

2013

Automatic Street Surface Modeling for Web-Based Urban Information Systems

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

Jumping Jack: A Parallel Algorithm for Non-Monotonic Stream Compaction

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

Sistema de Realidade Aumentada Baseado em Padrões Rectangulares de Dimensões Desconhecidas

Authors
José Martins; Jorge Silva; A. Augusto de Sousa

Publication
15 EPCG - 15º Encontro Português de Computação Gráfica, Porto Salvo, Portugal

Abstract

2011

Sketch Express: facial expressions made easy

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

Spatial TimeDB - Valid Time Support in Spatial DBMS

Authors
Alexandre Carvalho; Cristina Ribeiro; A. Augusto de Sousa

Publication
IADC 2006 - 2nd International Advanced Database Conference, San Diego, Estados Unidos América

Abstract

2008

A Temporal Focus + Context Visualization Model for Handling Valid-Time Spatial Information

Authors
Alexandre Carvalho; A. Augusto de Sousa; Cristina Ribeiro

Publication
Information Visualization - Information Visualization, vol.7, no.3, pp.265-274

Abstract

  • 2
  • 11