Geographical Information Systems Theory, Applications and Management 4th International Conference, GISTAM 2018, Funchal, Madeira, Portugal, March 17-19, 2018, Revised Selected Papers - Ragia, Lemonia; Ragia, Lemonia; Grueau, Cédric; Grueau, Cédric; Laurini, Robert; Laurini, Robert (Springer International Publishing : Imprint: Springer, 2019)