Creation, Implementation and Evaluation of An Indoor Navigation System for Users with Disabilities

Journal article (2022)

Authors

Y. M. Montilla Universidad Nacional de Colombia
C.A. León Sánchez Urban Data Science - Architecture and the Built Environment
I. Lizarazo Salcedo Universidad Nacional de Colombia
Research Group
Urban Data Science (Architecture and the Built Environment) (TU Delft)
Copyright: © 2022 Y. M. Montilla, C.A. León Sánchez, I. Lizarazo Salcedo
DOI: https://doi.org/10.5194/isprs-annals-X-4-W2-2022-201-2022
More Info
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Published Date

2022

Language

English

Faculty

Architecture and the Built Environment

Department

Urbanism

Research Group

Urban Data Science

Abstract

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.