Abstract

MORENO, Francisco Javier; BOTA SIERRA, Sergio  and  CADAVID AGUDELO, Andrés Felipe. LUPA ESPACIO-TEMPORAL: UNA HERRAMIENTA PARA EL ANÁLISIS VISUAL DE TRAYECTORIAS EN UNA BODEGA DE DATOSA SPATIO-TEMPORAL MAGNIFYING GLASS: A TOOL FOR THE VISUAL ANALYSIS OF TRAJECTORIES IN A DATAWAREHOUSE. Cienc. Ing. Neogranad. [online]. 2014, vol.24, n.2, pp.77-96. ISSN 0124-8170.

This paper presents a visual tool to facilitate the trajectory analysis and the discovery of spatio temporal patterns in a trajectory data warehouse (TDW). The proposed tool is a spatio-temporal magnifying glass that allows analysts to focus on a specific region, where several trajectories have occurred and to detect, according to some parameters specified by the analyst through a graphical interface, e.g. the closeness relationship between trajectories or between a trajectory and its surrounding sites. In this paper, we propose and formally define derived closeness relationships between trajectories and between trajectories and sites. An additional contribution was the enrichment of a TDW model in order to allow the formulation of more expressive queries and to support the visualization aspect of the proposed tool. Although experiments that are more exhaustive are required, our results evidenced some spatio-temporal patterns that demonstrate the convenience and advantages of our tool.

Keywords : trajectories; trajectory analysis; episodes; stop episodes; proximity episodes; data warehouses; visualization; spatio-temporal.

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