{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:53:24Z","timestamp":1760234004680,"version":"build-2065373602"},"reference-count":69,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,3,19]],"date-time":"2021-03-19T00:00:00Z","timestamp":1616112000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>In this paper, we propose a decentralized semantic reasoning approach for modeling vague spatial objects from sensor network data describing vague shape phenomena, such as forest fire, air pollution, traffic noise, etc. This is a challenging problem as it necessitates appropriate aggregation of sensor data and their update with respect to the evolution of the state of the phenomena to be represented. Sensor data are generally poorly provided in terms of semantic information. Hence, the proposed approach starts with building a knowledge base integrating sensor and domain ontologies and then uses fuzzy rules to extract three-valued spatial qualitative information expressing the relative position of each sensor with respect to the monitored phenomenon\u2019s extent. The observed phenomena are modeled using a fuzzy-crisp type spatial object made of a kernel and a conjecture part, which is a more realistic spatial representation for such vague shape environmental phenomena. The second step of our approach uses decentralized computing techniques to infer boundary detection and vertices for the kernel and conjecture parts of spatial objects using fuzzy IF-THEN rules. Finally, we present a case study for urban noise pollution monitoring by a sensor network, which is implemented in Netlogo to illustrate the validity of the proposed approach.<\/jats:p>","DOI":"10.3390\/ijgi10030182","type":"journal-article","created":{"date-parts":[[2021,3,19]],"date-time":"2021-03-19T11:18:38Z","timestamp":1616152718000},"page":"182","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A Decentralized Semantic Reasoning Approach for the Detection and Representation of Continuous Spatial Dynamic Phenomena in Wireless Sensor Networks"],"prefix":"10.3390","volume":"10","author":[{"given":"Roger Cesari\u00e9","family":"Ntankouo Njila","sequence":"first","affiliation":[{"name":"Centre de Recherche en Donn\u00e9es et Intelligence g\u00e9Ospatiales (CRDIG), 0611 Pavillon Casault Universit\u00e9 Laval, Qu\u00e9bec City, QC G1K 7P4, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3688-6638","authenticated-orcid":false,"given":"Mir Abolfazl","family":"Mostafavi","sequence":"additional","affiliation":[{"name":"Centre de Recherche en Donn\u00e9es et Intelligence g\u00e9Ospatiales (CRDIG), 0611 Pavillon Casault Universit\u00e9 Laval, Qu\u00e9bec City, QC G1K 7P4, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean","family":"Brodeur","sequence":"additional","affiliation":[{"name":"G\u00e9oS\u00e9mantic Research, Sherbrooke, QC J1L 1W8, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,19]]},"reference":[{"key":"ref_1","unstructured":"Whittier, J.C.J., Nittel, S., and Subasinghe, I. 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