On 11 Jan 2008, at 11:21, David Earl wrote: > On 11/01/2008 00:55, Jon Burgess wrote: >> On Fri, 2008-01-11 at 00:09 +0000, martin dodge wrote: >>> Hi, >>> >>> Just found an interesting set of slides of a talk by Vanessa >>> Lawrence, OS >>> http://www.w3.org/2007/06/eGov-dc/presentations/ >>> VL_why_place_matters.pdf >>> with some prominent mentions for OSM. I particularly liked slide 46 >>> >> >> The map in his screenshot must be from quite some time ago. The same >> area of central London now has considerably more data > > I think that misses the point. There are still many, many other areas > where there is still just as little data, but that's not the point > either. > > The key thing is 'how do you know?'. If you look at the current > coverage > of that London area, it probably looks quite convincing now, > whereas in > her slide it was obviously incomplete, yet I bet it isn't (in fact, I > know it isn't - there are numerous missing streets in the densely > mapped > central London). How would I know this? How do I know whether I can > trust this map or not? (*) > > This was and remains one of my key concerns about OSM as a project. > I've > said before and I'll say again: we need a way of asserting "this > area is > complete" (for one or more definitions of completeness).
I see your concerns. Having some kind of completeness test and be able to say : this area is 'complete' would be a strong point. On the other hand, is Wikipedia complete? I don't think so. Nothing is compete:) > > Incidentally, this is exacerbated by the lazy rendering rule for > Mapnik What do you mean by 'lazy' rule? AFAIK, all available hardware is working hard day an night :) > - I was puzzled when someone said to me the other day "why is this > housing estate not connected to the rest of the road network?". It > was; > but adjacent Mapnik tiles were inconsistent (both laterally and by > zoom > level - and this wasn't a recently mapped area). You may not think > this > matters, but I think this is a public face and it causes further > confusion and mistrust. We can certainly improve here. Suggestions ? Artem > > David > > > (* And how would I know how to fill in the gaps if I was there without > revisiting every already mapped street?). > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk