Graham Jones <grahamjones...@gmail.com> wrote: > On 2 January 2012 15:47, Lester Caine <les...@lsces.co.uk> wrote: > > > Historic mapping wiki page has yet to be created, but start_date and > > end_date would seem to replace the need for Key:historic:period if > accurate > > data is available. > > > I think the issue is availability of accurate data - I am pretty > confident > that I can look at a building and think it is Tudor, or a fortress and > guess that it is Nepoleonic, but guessing the date seem somehow harder > to > me. > I would like the tagging to be accessible to non-history buffs, so > more > qualitative categories would seem easier than trying to be too > precise. By > all means include start_date if it is known though! > > > > > Having been watching a program recently on the development of > various > > industrial areas of the UK, it would seem that there is substantial > data > > available to provide historic maps. Development and decline of the > railway > > system for example is something I've been gathering historic maps > that > > provides considerable accurate timelines. > > > I like this sort of thing too, which is why we will need more > categories > than currently proposed 'modern' is too wide given all the changes in > the > 20th Century. > > > > The only question that still has not been addressed is one that > covers a > > lot of parallel data. SHOULD it be uploaded to the main database, or > should > > we have a working method for linking secondary databases into the > rendering > > process. Which to my mind still provides the most logical way > forward. But > > at what point does an historic element get degraded to the secondary > > storage area? Or more important ... what classifies historic data as > being > > 'main stream'? > > > > My view is that if it is something that is still there on the ground > (e.g. > the ruins of an old tin mine), then it should go in the main database. > If > there is nothing physically to see, it belongs in a specialist > historic > map. I haven't thought about how to make this separate map though.... > As far as rendering is concerned, it would be useful to be able to set starting and ending dates for a given renderiing, so that eventually you compare a series of maps and see patterns of changes. In some cases, you might want to show only the time period of interest; in other cases, you might want to show both historic data and current-day data.
-- John F. Eldredge -- j...@jfeldredge.com "Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk