Proceedings of the 20th international conference companion on World wide web
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Twitter is a unique microblog which is different from conventional social media in terms of its quickness. Many Twitter's users send messages to Twitter on the spot with mobile phones or smart phones, and some of them send tweets with photos and geotags, which can be regarded as being geotagged photos. Geotagged tweet photos are very useful to understand what happens currently over the world. In the demo, we introduce "World Seer" which is a real-time geo-tweet photo mapping system. Users can see the latest geo-tweet photos related to given keywords and areas on the online maps. The system shows geo-tweet photos not only on the map, but also on the street-view. In addition, for some parts of the geo-tweet photos, the system can show representative photos for the given locations and the given times employing the GeoVisualRank method which takes into account both visual features of photos and proximity of geotags.