Even though I am in Toronto I couldn’t resist looking at this excellent House Price cartogram for London. I agree with Ollie O’Brien when he says ‘We like the simple, “grid of squares” concept and the addition of the Thames. Cartograms are hard to produce in a way that makes them familiar to an audience familiar with Google Maps, but with this concept, that challenge may have been met.’ I think I would go further. By limiting the cartographic verisimilitude, and producing a bold simplified map that works intuitively – red to green for prices, and compass points in the right place – it is in the excellent and radical tradition of Harry Beck, creator of the familiar London Underground map. Sometimes less really is more.