Indoor navigation is a complex task for people and especially for visually impaired ones. This research proposes an indoor navigation system oriented to visually impaired users, integrating the OGC IndoorGML and CityGML standards with Bluetooth Low Energy devices (BLE) by using the RSSI signal loss value and the Weighted Path Loss-techniques to calculate the user's location. This paper describes the design of the system and its implementation as a functional prototype in a mobile web application. Several operational tests were conducted to determine both the accuracy and precision of the user location. The user's positioning results show a root-mean-squared error (RMSE) of 0.88 m in a scenario with obstacles and no height difference of the BLE devices location, and a RMSE of 1.06 m in a scenario with obstacles and height difference. These results confirm the potential of the implemented prototype to grow into a fully operational system.

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This article shows the development of an optimal location model, designed to respond to the deficit in the supply of justice facilities in the city of Bogotá D.C. - Colombia. This optimal location model considers criteria of spatial efficiency and territorial justice, as well as normative, geographical and social aspects that limit the selection of optimal sites and uses multicriteria analysis techniques based on fuzzy logic. This model aims to be a contribution to the planning and planning processes of the urban territory and constitutes a tool for spatial analysis focused on attending to the needs of security and coexistence in the city. El presente artículo muestra el desarrollo de un modelo de localización óptima, diseñado para responder ante el déficit en la oferta de equipamientos de justicia en la ciudad de Bogotá D. C. – Colombia. Este modelo de localización óptima tiene en cuenta criterios de eficiencia espacial y justicia territorial, así como aspectos normativos, geográficos y sociales que limitan la selección de los sitios óptimos, y utiliza técnicas de análisis multicriterio basado en lógica difusa. Este modelo pretende ser un aporte a los procesos de planificación y ordenación del territorio urbano y constituye una herramienta de análisis espacial enfocado en la atención de necesidades de seguridad y convivencia en la ciudad.@en