Sari Aslam, N; Cheng, T; Cheshire, J; Zhang, Y; (2019) Trip purpose identification using pairwise constraints based semi-supervised clustering. In: Robson, Craig and Fairbairn, David, (eds.) Proceedings of the Geographical Information Science Research UK Conference (GISRUK 2019). GISRUK (Geographical Information Science Research UK): Newcastle, UK. Green open access