Citizen science and WebGIS for outdoor advertisement visual pollution assessment Chmielewski, Szymon ; Samulowska, Marta ; Lupa, Michał ; Lee, Danbi ; Zagajewski, Bogdan Abstract Publication: Computers, Environment and Urban Systems Pub Date: January 2018 DOI: 10.1016/j.compenvurbsys.2017.09.001 Bibcode: 2018CEUS...67...97C