{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T04:30:01Z","timestamp":1772253001069,"version":"3.50.1"},"reference-count":34,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2018,12,11]],"date-time":"2018-12-11T00:00:00Z","timestamp":1544486400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Foundation for Science and Technology (FCT)","award":["project UID\/MULTI\/4466\/2016."],"award-info":[{"award-number":["project UID\/MULTI\/4466\/2016."]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This research work uses a simplified approach to combine location information from a beacon\u2019s propagation signal interaction with a mobile device sensor (accelerometer and gyroscope) with local building information to give real-time location and guidance to a user inside a building. This is an interactive process with visualisation information that can help user\u2019s orientation inside unknown buildings and the data stored from different users can provide useful information about users\u2019 movements inside a public building. Beacons installed on the building at specific pre-defined positions emit signals that give a geographic position with an associated imprecision, related with Bluetooth\u2019s range. This uncertainty is handled by building layout and users\u2019 movement in a developed system that maps users\u2019 position, gives guidance, and stores user movements. This system is based on an App (Find Me!) for Android OS (Operating System) which captures the Bluetooth Low Energy (BLE) signal coming from the beacon(s) and shows, through a map, the location of the user\u2019s smartphone and guide him to the desired destination. Also, the beacons can deliver relevant context information. The application was tested by a panel of new and habitual campus users against traditional wayfinding alternatives yielding navigation times about 30% smaller, respectively.<\/jats:p>","DOI":"10.3390\/s18124374","type":"journal-article","created":{"date-parts":[[2018,12,12]],"date-time":"2018-12-12T03:27:49Z","timestamp":1544585269000},"page":"4374","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Beacons and BIM Models for Indoor Guidance and Location"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6662-0806","authenticated-orcid":false,"given":"Joao C.","family":"Ferreira","sequence":"first","affiliation":[{"name":"ISTAR-IUL, Instituto Universit\u00e1rio de Lisboa (ISCTE-IUL), Lisboa 1649-026, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2155-5625","authenticated-orcid":false,"given":"Ricardo","family":"Resende","sequence":"additional","affiliation":[{"name":"ISTAR-IUL, Instituto Universit\u00e1rio de Lisboa (ISCTE-IUL), Lisboa 1649-026, Portugal"}]},{"given":"Stuart","family":"Martinho","sequence":"additional","affiliation":[{"name":"ISTAR-IUL, Instituto Universit\u00e1rio de Lisboa (ISCTE-IUL), Lisboa 1649-026, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2018,12,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Jain, M., Rahul, R.C.P., and Tolety, S. (2013, January 22\u201325). A study on Indoor navigation techniques using smartphones. Proceedings of the 2013 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Mysore, India.","DOI":"10.1109\/ICACCI.2013.6637333"},{"key":"ref_2","unstructured":"Eastman, C., Teicholz, P., Sacks, R., and Liston, K. (2011). BIM Handbook: A Guide to Building Information Modeling for Owners, Managers, Designers, Engineers and Contractors, John Wiley & Sons."},{"key":"ref_3","unstructured":"Belwariar, R. (2018, October 08). A* Algorithm. Available online: https:\/\/www.geeksforgeeks.org\/a-search-algorithm\/."},{"key":"ref_4","unstructured":"Looker, C. (2018, August 09). Free Software License A*. Available online: http:\/\/www.codelooker.com\/id\/215\/1123818.html."},{"key":"ref_5","unstructured":"L. I. Inc. (2018, October 28). Indoor Location Technologies Compared. Available online: https:\/\/lighthouse.io\/indoor-location-technologies-compared\/."},{"key":"ref_6","unstructured":"(2018, December 06). Available online:. Available online: http:\/\/it-jim.com\/2017\/08\/15\/overview-of-indoor-navigation-technologies\/."},{"key":"ref_7","unstructured":"World Economic Forum (2017). Shaping the Future of Construction\u2013Inspiring Innovators to Redefine the Industry, World Economic Forum."},{"key":"ref_8","unstructured":"(2018, October 28). Revit Web Site. Available online: https:\/\/www.autodesk.com\/products\/revit\/overview."},{"key":"ref_9","unstructured":"(2018, October 28). API Developers. Available online: https:\/\/help.autodesk.com\/view\/RVT\/2019\/ENU\/?guid=Revit_API_Revit_API_Developers_Guide_html."},{"key":"ref_10","unstructured":"Dynamo (2018, August 08). Dynamo BIM. Available online: http:\/\/dynamobim.org\/."},{"key":"ref_11","unstructured":"(2018, August 08). Web Page. Available online: http:\/\/www.autodeskresearch.com\/projects\/dasher."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.autcon.2018.07.022","article-title":"A framework for integrating BIM and IoT through open standards","volume":"95","author":"Dave","year":"2018","journal-title":"Autom. Constr."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/j.aei.2012.10.001","article-title":"The IFC-based path planning for 3D indoor spaces","volume":"27","author":"Lin","year":"2013","journal-title":"Adv. Eng. Inform."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.aei.2015.11.004","article-title":"Extending IFC to incorporate information of RFID tags attached to building elements","volume":"30","author":"Motamedi","year":"2016","journal-title":"Adv. Eng. Inform."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Scheffer, M., Konig, M., Engelmann, T., Tagliabue, L.C., Ciribini, A.L.C., Rinaldi, S., and Pasetti, M. (2018, January 16\u201318). Evaluation of Open Data Models for the Exchange of Sensor Data in Cognitive Building. Proceedings of the 2018 Workshop on Metrology for Industry 4.0 and IoT, Brescia, Italy.","DOI":"10.1109\/METROI4.2018.8428349"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Chen, J., Tanyel, B., John, T., and Guney, O. (2014, January 19\u201321). A Case Study of Embedding Real-time Infrastructure Sensor Data to BIM. Proceedings of the Construction Research Congress, Atlanta, GA, USA.","DOI":"10.1061\/9780784413517.028"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1016\/j.autcon.2017.09.005","article-title":"BIMSL: A generic approach to the integration of building information models with real-time sensor data","volume":"84","author":"Alves","year":"2017","journal-title":"Autom. Constr."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Bottaccioli, L. (2017, January 4\u20138). Building Energy Modelling and Monitoring by Integration of IoT Devices and Building Information Models. Proceedings of the 2017 IEEE 41st Annual Computer Software and Applications Conference (COMPSAC), Turin, Italy.","DOI":"10.1109\/COMPSAC.2017.75"},{"key":"ref_19","unstructured":"Lin, X.Y., Ho, T.W., Fang, C.C., Yen, Z.S., Yang, B.J., and Lai, F. (2015, January 25\u201329). A mobile indoor positioning system based on iBeacon technology. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Milan, Italy."},{"key":"ref_20","unstructured":"Park, J., Cho, Y., and Ahn, C. (June, January 31). A Wireless Tracking System Integrated with BIM for Indoor Construction Applications. Proceedings of the Construction Research Congress, San Juan, Puerto Rico."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Miesenberger, K., Klaus, J., Zagler, W., and Karshmer, A. (2008). A Smart Indoor Navigation Solution Based on Building Information Model and Google Android. Computers Helping People with Special Needs, Springer.","DOI":"10.1007\/978-3-540-70540-6"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"417","DOI":"10.5194\/isprs-annals-IV-2-W4-417-2017","article-title":"Bim-based indoor path planning considering obstacles","volume":"IV-2\/W4","author":"Xu","year":"2017","journal-title":"ISPRS Ann. Photogramm. Remote Sens. Spat. Inf. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.autcon.2015.09.010","article-title":"Algorithms for automated generation of navigation models from building information models to support indoor map-matching","volume":"61","author":"Taneja","year":"2016","journal-title":"Autom. Constr."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"05016019","DOI":"10.1061\/(ASCE)CO.1943-7862.0001223","article-title":"Framework of Automated Construction-Safety Monitoring Using Cloud-Enabled BIM and BLE Mobile Tracking Sensors","volume":"143","author":"Park","year":"2016","journal-title":"J. Constr. Eng. Manag."},{"key":"ref_25","unstructured":"Azenha, M., Martins, J.P., Costa, A.A., Lacerda, N., and Bastos, F.T. (2016). Plataforma Web-BIM para Gest\u00e3o de Instala\u00e7\u00f5es de um Campus Universit\u00e1rio. 1\u00b0 Congresso Portugu\u00eas de Building Information Modelling, Universidade do Minho."},{"key":"ref_26","unstructured":"E. Inc. (2018, November 01). IBeacon Protocol. Available online: http:\/\/developer.estimote.com\/ibeacon\/."},{"key":"ref_27","unstructured":"E. Inc. (2018, August 08). Estimote Monotoring API. Available online: https:\/\/developer.estimote.com\/android\/tutorial\/part-2-background-monitoring\/."},{"key":"ref_28","unstructured":"E. Inc. (2018, August 08). Beacon Signal carachteristics. Available online: https:\/\/community.estimote.com\/hc\/en-us\/articles\/201636913-What-are-Broadcasting-Power-RSSI-and-other-characteristics-of-a-beacon-s-signal-."},{"key":"ref_29","unstructured":"Martinho, S. (2018). Find Me!: IoT Indoor guidance System Master in Computer Science Engineering at ISCTE-IUL, ISCTE-IUL."},{"key":"ref_30","unstructured":"Resende, R. (2018, November 08). Main Dynamo Script for Beacon and Door\/Room Tables Production. Available online: http:\/\/istar.iscte-iul.pt\/wp-content\/uploads\/2018\/11\/2018_ferreira_resende_martinho_dynamoscript_image_1mb.png."},{"key":"ref_31","unstructured":"Pawelc (2018, August 09). A* Code Author. Available online: http:\/\/www.codelooker.com\/blog\/index.asp?username=pawelc."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Loong, W.Y., Long, L.Z., and Hun, L.C. (2011, January 17\u201319). A Star Path Following Mobile Robot Wong. Proceedings of the 4th International Conference on Mechatronics, Lumpur, Malaysia.","DOI":"10.1109\/ICOM.2011.5937169"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"32","DOI":"10.4114\/intartif.vol20iss59pp32-41","article-title":"Mining users mobility at public transportation","volume":"20","author":"Baeta","year":"2017","journal-title":"Intel. Artif."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Omatu, S., Semalat, A., Bocewicz, G., Sitek, P., Nielsen, I.E., Garc\u00eda Garc\u00eda, J.A., and Bajo, J. (2016). Methodology for knowledge extraction from mobility big data. 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