Understanding the activity of contributors to VGI projects . How , why , where , and when do they contribute geographic information ?

The crowdsourced collection of geographic information (Volunteered Geographic Information VGI) has moved to the center of the research agenda in Web technologies and GIS. Much of the current VGI research is tightly coupled with issues related to the quality of the collected geodata and possible conflation or comparison with other official sources of geodata… CONTINUE READING