So far I've found two maps for coffee in London. One is an alternative tube map...

http://londonist.com/2014/01/alternative-tube-maps-coffee-shops

The other is a standard street map...

http://londoncoffeeguide.com/London-Coffee-Map.aspx

I wonder how they choose the shops to add to the map, what the standards are. 

This morning I wanted to hit at least two more shops in London before I head to the airport, but I needed to be south of the city, outside the congestion charging zone. Google Maps gave me and incorrect location for Monmouth Coffee, causing me to camp out in the wrong place.

I found someone to plot the correct location, but it is in the congestion zone, so I had to settle for Electric Elephant, which I found on the tube map. I forgot to take a photo, but that's okay, because the place is not what I'm looking for. The owner use some no-name roaster that is a friend of hers, and does not offer any filter coffee. I had a long black, and it was pretty much just caffeine--no flavour that I cared about.
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