I tend to see an NPE tag as something that needs attention. A lot of the
area, where I now live, North Shropshire, was armchair mapped using NPE
maps. That includes a lot of roads, I am getting through resurveying
them but even today I found one that according to my GPS was 50m from
where it should be.

In the case of a road I see it as an indication that there is a road
there (somewhere), or it may be a dirt track, NPE did not show the
difference and I have re-tagged quite a few of these.

Phil (trigpoint)


On Sun, 2013-10-06 at 16:23 +0000, Barnett, Phillip wrote:
> Paul,
> 
> NPE maps were the first backgrounds for the editors other than some
> quite low res Yahoo imagery of the UK, so people used them for mapping
> streams/rivers/woods etc back in the day. As you have noticed, they
> don’t necessarily relate to modern streams – they may have dried up or
> been culverted/piped long since. They are all over 50 years old, (for
> copyright reasons) after all.
> 
> Yes, if the facts on the ground have changed, then the stream needs to
> be moved, or removed. No process needed, just use an editor. 
> 
>  
> 
> Note – only remove NPE tagged items if you know they have changed –
> don’t just do a mass-remove! (That’s in the unlikely event you were
> planning to write a bot to remove them all!)
> 
> Phil
> 
>  
> 
> 
>  
> 
> 
> 
> PHILLIP BARNETT
> SERVER MANAGER
> 
> 200 GRAY'S INN ROAD
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> P Please consider the environment. Do you really need to print this
> email?
> 
>  
> 
> From: Paul Churchley [mailto:[email protected]] 
> Sent: 06 October 2013 16:57
> To: [email protected]
> Subject: [Talk-GB] NPE data
> 
> 
>  
> 
> I have come across some data tagged as source=npe. I know what the NPE
> maps are but my question is a bit of a newbies one... why is NPE data
> mapped on OSM if it is so old?
> 
> 
> I have just mapped an area for a customer of mine and there is a
> stream mapped running right through the centre of his property. It is
> tagged source=npe. The stream is no longer there and hasn't been for
> the 20 or so years he has owned the property.
> 
> 
> The old stream is showing up on OSM rendered tiles. His properly is a
> caravan site and so it would be good if his property did not have a
> stream that no longer exists running through it as it suggests that it
> might flood... which it doesn't. 
> 
> 
> What is the situation regarding npe data? Can it be removed? Obviously
> I would just remove it!!! But is there is a process to get it removed?
> If it is to be kept, then how can we get the OSM tiles rendered
> without it showing this old stream? I can see that some specialist
> tiles might want to show old data like this but I wouldn't have
> thought it appropriate that normal OSM tiles would need to show this
> old data would it?
> 
> 
> Any help would be appreciated.
> 
> 
> Paul
> 
> 
> 
> 
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