来源:Future Internet , 2014
作者:Christoph Perger;Ellsworth LeDrew;Linda See;等
关键词:crowdsourcing;Volunteered Geographic Information;...
使用许可:CC BY
来源:Future Internet , 2014
作者:Christoph Perger;Ellsworth LeDrew;Linda See;等
关键词:crowdsourcing;Volunteered Geographic Information;...
使用许可:CC BY