“…with others, but also share such information/ knowledge through geo-social networks (Shankar, Huang, Castro, Nath, & Iftode, 2012;Vicente, Freni, Bettini, & Jensen, 2011), social media services, and geospatial information services, enabling a broad range of applications and services, such as urban dynamic mining, public safety, and environment monitoring. The exchange of sensor and user-generated data and the provision of Volunteered Geographic Information (VGI) (Sui, Elwood, & Goodchild, 2012) emphasize a collaborative participatory sensing and crowdsourcing environment (Reddy et al, 2009;Wirz et al, 2013) that is expected to play a key role in this context.…”