Dear Lester, > start_date and end_date exist, But are not used as much SHOULD be. > http://www.slideshare.net/frankieroberto/mapp-history-on-open-street-map was > presented last year and gives a nice summary ...
I was sure somebody would have done this before!. I'll ask Mr Roberto if he pursued this any further. > The problem with providing the data in a separate database is how to sync the > two ... when does something marked as 'demolished' get moved to the 'historic' > version. Either there should be a proper mechanism for providing 'overlays', > or the data simply gets stored in the exidting database. In many cases ALL > this is missing is a start_date for existing objects on the ground. While > some objects my eventually be obliterated by future development, on the whole > the road system in London for example has simply evolved and expanded so all > that is needed is to know when a road first appeared? No clutter as such, > just currently missing real data? Agreed, hopefully the archives holding a lot of this data/maps would be interested in integrating it into an historical OSM. regards, Richard -- Richard Palmer | Centre for E-Research & Systems Manager | Centre for Computing in the Humanities richard.d.pal...@kcl.ac.uk | King's College London Tel: 0207 848 1973 _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb