[Talk-GB] >- Map layer with OS Locator comparison from ITO
Jerry Clough - OSM
sk53_osm at yahoo.co.uk
Wed Jun 2 16:21:29 BST 2010
I'm with Andy on this.
Virtually all the
disagreements between names of roads which I have walked down and
entered in OSM were down to thick fingers on my part. The places where
the OS have got it wrong are few and far between (perhaps a bit less
than 0.5%), but I had to go searching through photographs, audio files
etc. to make sure that some of these were indeed OSGB errors, as my own
transcription error rate is at least 10 times higher. Use of a not:name
tag need not be widespread: it only needs to be used when there is an
apparently authoritative source which is wrong (i.e., OSGB).
To give two simple examples, where I have already used it:
Smythson Drive is given as 'Smithson Drive' on StreetView and OS Locator. I could quite easily
have assumed that the it was named after the architect Robert Smythson
who is buried in the local church, but equally the person who signed the road might not have known the likely origin of the name. However, I do
have photos of the street sign (which took me about 10 minutes to find). A not:name tag means that I don't have to do that again, and hopefully, it will discourage others from an error of commission.
Chancery located here on OS
Locator, simply does not exist. It's quite nice not to go off to survey
some figment of the OSGB's imagination. There is another misplaced
(duplicate) road nearby. Again some formalised form of the note tag
seems sensible to identify such cases.
Of course, in the case of
misnamed roads other more positive evidence can be included, for
instance links to audio or image files. In the case of The Chancery I have also documented this on the
relevant Wiki page.
From: Andy Allan
<gravitystorm at gmail.com>
To: Chris Hill <osm at raggedred.net>
Cc: talk-gb OSM List (E-mail)
<talk-gb at openstreetmap.org>
Sent: Tue, 1 June, 2010 15:50:41
Subject: Re: [Talk-GB] >- Map layer with OS Locator comparison from ITO
On Tue, Jun 1, 2010 at 3:39 PM, Chris Hill <osm at raggedred.net> wrote:
> On a rainy afternoon I took a look at your overlay and I think it is
> potentially very useful. The main issue I guess is this new tag. I
> "not:*" is imaginative, but it rankles with me somehow.
How about just
> putting source:name=survey on roads that
contradict OS Locator to show
> they have been checked on the
All the roads I've mapped have been from survey, but what of those
ham-fisted moments in front of the computer?
I think positively identifying what you disagree with is better than
side-effects of other statements. After all, source:name=survey
necessarily mean that you've checked the disagreement between
OSM and confirmed that OSM is correct.
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