Pushing the boundaries
Boundaries by Tom Taylor is a nifty thing that uses Flickr shapefiles to find a place and its neighbours. I'm saying that like I understand it (I don't), but it sure is pretty. I guess it's a crowd-sourced, more accurate version of this.
It doesn't seem to recognise Noho anyway, like most Londoners, apart from the ones that made this map in the first place.