Geographical Information Systems Theory, Applications and Management : 7th International Conference, GISTAM 2021, Virtual Event, April 23-25, 2021, and 8th International Conference, GISTAM 2022, Virtual Event, April 27-29, 2022, Revised Selected Papers - Grueau, Cédric; Laurini, Robert; Ragia, Lemonia (Cham Springer, 2023)