See, Linda; Mooney, Peter; Foody, Giles; Bastin, Lucy; Comber, Alexis; Estima, Jacinto; Fritz, Steffen; Kerle, Norman; Jiang, Bin; Laakso, Mari; Liu, Hai-Ying; Milčinski, Grega; Nikšič, Matej; Painho, Marco; Pődör, Andrea; Olteanu-Raimond, Ana-Maria; Rutzinger, Nartin (Journal article; Peer reviewed, 2016)
Citizens are increasingly becoming an important source of geographic information,sometimes entering domains that had until recently been the exclusive realm of authoritative agencies.This activity has a very diverse ...