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John Rowland · February 21st 07, 12:15 PM posted to uk.transport.london

wrote:
On Feb 20, 11:03 pm, "John Rowland"
wrote:
wrote:
On Feb 20, 2:40 pm, "John Rowland"
wrote:

I'd like bus shelters to bear accurate mathematically distorted
geographical maps, where, for instance, distance from the centre of
the map is proportional to the square root of the actual distance
on the ground, and any super-long routes have an arrow at the edge
of the map listing further destinations.

How do you handle the case where two bus routes share the same
stretch of road, diverge, and then rejoin at another point?

You either give them different colours, or you show them as
separating and converging like the Northern Line - whichever makes
the map easier to understand (which would depend on what else was
going on in the map).

But then this would destroy the accurate mathematical distortion
property.

Even Ordnance Survey 1:50000 maps contain local distortions to cope with the
fact that roads are shown wider than they really are.