[Talk-GB] This one is driving me potty

[SomeoneElse]

Brad Rogers wrote:
> As they stood, they bore little relation to what's actually on the 
> ground. Same applies to lots of waterways in the area. I believe they 
> were loaded en mass from an open source data set, but I'm not sure.

"source=npe" suggests that they were traced from New Popular Edition 
maps, such as:
http://a.ooc.openstreetmap.org/npe/13/4012/2741.png

Back before Bing and OS StreetView, it was one of the very few available 
UK tracing sources - lots of roads (mostly since corrected) and 
waterways (often largely not) were traced from NPE. By current standards 
(Bing imagery, EGNOS-capable GPS) it isn't terribly accurate.  Some area 
are worse than others - my bit of Derbyshire/Notts seems to have 
suffered from a "Friday map update" - some of the railway lines drawn in 
are topologically correct only.

When I'm creating Garmin maps I stick "NPE" on the end of the name of 
anything that has that in the source, to make it an obvious target for 
remapping.

Cheers,
Andy