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Abstract

VGI-systems enable researchers to collect geographic information located on private property that otherwise would be difficult to get. In a time of information overload it is difficult to get users to use a system and to get them spending time sharing geographic information. These points are crucial for the success of a project involving VGI. In this context we here evaluate usage statistics of two different participatory websites: “Signalez-nous” which is a platform to announce broken streetlights and “Urbangene” which aims at digitizing locations of ponds and species. In both cases media campaigns were used to recruit new users. However their influence quickly decreased. An important finding is how a system’s benefits are shared with the users. If the interest is less obvious to a user, other techniques need to be used.

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