“…The first group of papers describes IoT applications containing massive data with spatial aspects. The papers in this group were distributed through many domains listed in RQ1, such as transport and traffic (Cao & Wachowicz, 2019;Coşkun, Çakır, & Anbaroğlu, 2020;Dao, Nguyen, Kiran, & Zettsu, 2020;Duan et al, 2020;Hu et al, 2021), smart cities (Anejionu et al, 2019;Kim et al, 2012;Rathore et al, 2016;Unal et al, 2018;Wen et al, 2016), logistics (Fernández et al, 2018;Finogeev et al, 2019;Li et al, 2015;Suárez et al, 2015) and smart environments (Antonić et al, 2016;Fang et al, 2014Fang et al, , 2015Fang et al, , 2017Terziyski, Tenev, Jeliazkov, Jeliazkova, & Kochev, 2020;Xuyao et al, 2013;Zou et al, 2021).…”