Stewart Whiting Omar Alonso Vasileios Kandylas Serge-Eric Tremblay Urban Maps of Social Activity. 717- 2018 ICWSM https://aaai.org/ocs/index.php/ICWSM/ICWSM18/paper/view/17880 conf/icwsm/2018 db/conf/icwsm/icwsm2018.html#WhitingAKT18