Following up from my Glasgow Regions Mapped Update.
Alasdair Rae recently started a crowdsourcing project for four cities in the UK: London, Birmingham, Manchester, and Glasgow. Original page. Write up of the results. The post was however very popular and resulted in responses from around the world.
So I created a breakdown of the number of responses in 1 km grids for each city that received at least 5 responses.
The full album, ordered by country name and then city name can be found: