Geo-reCAPTCHA: Crowdsourcing large amounts of geographic information from earth observation data

Citizens as sensors: the world of volunteered geography

Michael F. Goodchild · GeoJournal · 2007 · 4.5K citations

Social Sciences, Geography, Human Geography +11

reCAPTCHA: Human-Based Character Recognition via Web Security Measures

Luis von Ahn, Benjamin Maurer, Colin McMillen et al. · Science · 2008 · 1.1K citations

Computing, Computer Science, Cybersecurity +13

The credibility of volunteered geographic information

Andrew J. Flanagin, Miriam J. Metzger · GeoJournal · 2008 · 755 citations

Social Sciences, Geography, Human Geography +8

Multi-digit Number Recognition from Street View Imagery using Deep Convolutional Neural Networks

Ian Goodfellow, Yaroslav Bulatov, Julian Ibarz et al. · arXiv (Cornell University) · 2013 · 437 citations · Full text

Computing, Computer Science, Computer Vision +14

Real-Time Crisis Mapping of Natural Disasters Using Social Media

Stuart E. Middleton, Lee Middleton, Stefano Modafferi · IEEE Intelligent Systems · 2014 · 425 citations

Computing, Geography, Geoinformatics +17