This book contains the full research papers presented at  the 20th AGILE Conference on Geographic Information Science, held in 2017 at Wageningen University &  Research  in Wageningen, the Netherlands. The selected contributions show trends in the domain of geographic information science directed to spatio-temporal perception and spatio-temporal analysis. For that reason the book  is also of interest to professionals and researchers in fields outside geographic information science, in which the application of geoinformation could be instrumental in sparking societal innovation.