Last week Ed Manley and I published a map showing the top 10 twitter languages in London. To our surprise it made it to page 3 of the Metro (the next day was a monkey that looks like Einstein, so we are in good company) and was picked up by many of the national newspapers and science press. With all the hype surrounding the basic map we wanted to do something extra special for the mappinglondon blog, so Ollie has worked his web-mapping magic to create a fully interactive version in order that you can see the landmarks and streets the tweets correspond to. The map contains the geographic locations of about 3.3 million geo-located tweets...