vital marker qualitative spatial reasoning GIS

Preston, William, Benford, Steve, Thorn, Emily-Clare, Koleva, Boriana, Rennick-Egglestone, Stefan, Mortier, Richard, Quinn, Anthony, Stell, John and Worboys, Michael (2017) Enabling hand-crafted visual markers at scale. In: DIS '17 Proceedings of the 2017 Conference on Designing Interactive Systems. ACM Press, NY, USA, pp. 1227-1237. ISBN 978-1-4503-4922-2 (doi:https://doi.org/10.1145/3064663.3064746)