On 2015\12\16 10:43, Roland Perry wrote:
In message , at 07:48:18 on Wed, 16 Dec
2015, Basil Jet remarked:

The East London line through Whitechapel and the line through
Cambridge Heath are the same colour and almost co-linear, so the eye
follows them as a single line

My eye isn't tricked like that, and they *are* both the Overground,
after all.

Maybe like me you could have a good stab at drawing this map from
memory. But we should judge a map through the eyes of the clueless.