On 15/09/2014 08:53, Stephan Knauss wrote:
So actually a map with no diff is good. At least a good indication
that the map is not missing something important. Assuming for a moment
that Google data is a perfect reference (which is not as we all know).
Unfortunately, "we" (as in all OSM users using QA sites) don't all know
this. That's why I made the comment up the thread about Google (and
actually also Apple) Maps showing a road locally to me that doesn't exist.
There's an increasing problem with relatively inexperienced users*
thinking that if a QA site no longer shows a problem, then the problem
is "fixed", and here it's compounded by saying "a perfect map is grey".
In reality of course you'd need to go there and have a look to make
sure. Of course, sometimes you can't do that (the area's physically
inaccessible, or far away and there are no local mappers available to
fix a problem) and in those cases QA sites such as yours can be
extremely useful.
Other QA sites tend to make it clear what they're actually showing (e.g.
"musical chairs" has in capital letters at the bottom of the screen
"THIS IS A LIST OF DISAGREEMENTS, NOT NECESSARILY OSM ERRORS". Clearly
some sort of disclaimer text like that would make sense, but would it
perhaps also be possible to guide new mappers towards other fixing
options available, such as:
o find a local mapper and contact them - even just to ask if (a) is
correct and then (b), and then do the edit based on that.
o where there are no local active mappers add a note that someone can
see when they're next in the area requesting a survey.
Cheers,
Andy
* actually, it's not just relatively inexperienced mappers. Recently in
the UK we had someone inventing footpaths to join (arguably mistagged)
highway=pedestrian islands to nearby roads. Just this morning we've had
someone decided that the actual metal signs describing a road are
clearly wrong when compared to what Ordnance Survey's open data says.
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