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
_______________________________________________
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb
