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The increasing dissemination of information demands new techniques to represent and visualize data, so that the user can understand information sets to support decision-making in a fast and adequate way. This paper presents the DATAVIS-AR, a virtual environment for data visualization that incorporates augmented reality, which allows graphics to be superimposed over scenes from the real world. The main benefits of DATAVIS-AR is that the user can manipulate (put, delete, arrange and configure) graphics in the real world, enabling the detailed understanding of the considered data sets and contributing to improve the decision making. An application example representing the traffic of vehicles in a toll plaza is given and the results are discussed.