Harvesting ambient geospatial information from social media feeds

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#Earthquake: Twitter as a Distributed Sensor System (2013, background): “…through retweeting or following) and this can lead to the establishment of geographically defined complex social network groups (see for example, Stefanidis et al. 2012), the collaboration of these groups tends to be ad-hoc and not as rapid as in traditional wireless sensor networks (Honey and…”
The Geography and Importance of Localness in Geotagged Social Media (2016, background): “, [38,44,49]) now regularly use social media VGI to better understand phenomena of interest ranging from social unrest and emergencies [6,24,43] to disease tracking [22,27,42].”
Crowdsourcing, Citizen Science or Volunteered Geographic Information? The Current State of Crowdsourced Geographic Information (2016, background): “[16] in relation to the analysis of Twitter data.”
Big Data in Natural Disaster Management: A Review (2018, background): “While crowdsourcing data are actively contributed, social media data are mostly passively contributed, because the contributors are not aware that their activities on social media are leading to data collection [62].”