The 'Bird Index' was born in 2014. A single tweet postulated that the cultural northern-ness of England could be approximated by the ratio of Greggs the Bakers to Pret a Manger in an area.
It's been a long-term idea of mine to construct a Greggs:Pret ratio of cultural northern-ness for every part of England. But I'm too lazy.— Mike Bird (@Birdyword) August 19, 2014
I now realise that the only way to satisfactorily visualise the Bird Index was to invent the 'eatmap™: a heatmap of eateries.
If you like this, please think about coming to my event on OpenData in housing this Friday (22/08/2014) in Leeds. Or look for upcoming OpenData training I will deliver at the OpenData Institute Node in Leeds starting in September. I can teach you how to do this yourself, and it'll probably be free. There'll be a blog post on how I did all this soon, but I can't promise when.