On 15/09/15 08:42, Martin Koppenhoefer wrote: >> If it wasn't clear already, railway=dismantled, end_date, or any >> > system that mixes past and present in the same namespace is IMHO not >> > acceptable. > > I agree that end_date is not a desirable way to add stuff. > > railway=dismantled on the other hand is not a past feature, it is a > dismantled railway now, in the present. In the past it was a railway=rail etc.
The crux of the problem here is 'end_date' and if it is to be supported or not. I'm perfectly happy that features which exist on the ground need to be documented, and even having removed the tracks, a rail bed is still a substantial structure which can be reused or robbed out. The use of the name 'Abandoned Railway' on a cycle track is an alternate compromise, so it is just breaks which we are discussion here. If OHM WAS usable as an alternate source of data in parallel with the main database I would not have a problem, but the discussions there are at a tangent to the main problem of retaining material that has been accurately mapped already and for which 'end_date' is the perfect tag. The difficulty here is distinguishing data that has been deleted or changed because it was simply wrong and changes that result from re-tasking or redeveloping areas. I've already given a good practical example in the case of Tollbar improvements which are still work in progress, but the current data is not as accurate as it could be because elements are mapped that do not yet exist and elements which have been realigned do not actually follow the current state on the ground. The full scheme started life back in 1998 and the various phases were well documented showing what was to be added and deleted at each stage, so careful mapping taking note of both start and end dates COULD have done a better job, and this IS about mapping the present! It shows what is planned so drivers know of the disruption and while dates will change updating them builds the very history *I* am talking about, so ALL we are discussing is what happens to the bits as the forthcoming end_date is reached? And what is shown for sections for which a 'start_date' is still to be achieved. ARCHIVING material is the question here while keeping it available to view in conjunction with the current state on the ground along with the future planned state. History is an inherent part of the current 'namespace'! -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk