that citcle, there's a lot more than four kilometres. it's the culmination of years of work. we have satellite view, the world's thermometer and these are literally the raw images. here, the first image we took was of rome, and you can see the hot areas in brighter colours and the blue areas are the cooler areas in the city. this one is taken at night, and what you can see, the vatican is very, very hot. this summer, there were big heatwaves, that building absorbed a lot of energy, and at night, it's radiating. the heat maps, which are still images in short images and videos, could have wide application, but a particularly useful in climate—related matters. we think every city would want this. there's a new city manager