In general waterways mapped with NPE will be rather inaccurate. It is more likely that this stream still exists but is perhaps as much has 200 metres away. Masses of persistent features (notably streams, but also major roads etc) were mapped from NPE maps upto around 2010 when OS OpenData and Bing maps became available. There has been no concerted effort to revise this data: perhaps there should be now!
Jerry On 6 October 2013 17:23, Barnett, Phillip <[email protected]> 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 > LONDON > WC1X 8XZ > UNITED KINGDOM > T +44 207 430 4474 > E [email protected] > WWW.ITN.CO.UK > 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**** > > > > Please Note: > > Any views or opinions are solely those of the author and do not > necessarily represent those of Independent Television News Limited unless > specifically stated. This email and any files attached are confidential and > intended solely for the use of the individual or entity to which they are > addressed. If you have received this email in error, please notify > [email protected] > > Please note that to ensure regulatory compliance and for the protection of > our clients and business, we may monitor and read messages sent to and from > our systems. > > _______________________________________________ > Talk-GB mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-gb > >
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