Volunteered Geographic Information
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The ubiquity of the Internet and advanced information and communication technologies changes the role of users from passive to active. In the past, users only passively received data from authorized data sources. However, currently, users can actively harness online platforms to gather and collect online content to create user-generated content, such as Wikipedia. Moreover, advanced geoweb technologies change the ways of collecting geographic data. This change allows ordinary citizens to act as sensors collecting geographic information, as described by Michael Goodchild, who introduced the term volunteered geographic information (VGI) in 2007. VGI is a special form of user-generated content, whereby the contributed content includes geographic information. Geographic information is data that describe features located on the Earth’s surface. In VGI, volunteers collect the geographic data ...
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