[7] Additionally, VGI commonly populates the content offered through location-based services such as the restaurant review site Yelp.
While this is often taken to relate to elements of traditional cartography, VGI offers the possibility of including subjective, emotional, or other non-cartographic information.
[9] Geo-referenced data produced within services such as Trip Advisor, Flickr, Twitter,[10] Instagram[11] and Panoramio can be considered as VGI.
[14] Because it is gathered by individuals with no formal training, the quality and reliability of VGI is a topic of much debate.
[20][21][22] Additionally, VGI provides positive emotional value to users in functionality, satisfaction, social connection and ethics.