On 23 December 2010 13:10, Laurence Penney <[email protected]> wrote: > I've been 'exploding' several building nodes into ways, based on splendid > Bing imagery for Bristol. I'm getting concerned about data loss, the fact > that any external database accumulating information on such vulnerable nodes, > e.g. [1], will only with difficulty and guesswork be able to match it to the > way that replaced it. > > I know the subject's been brought up several times before, but I'd to know > the current state. > > * Is there a tagging convention to record node->way conversion, i.e. what was > this way's predecessor_node? > * If there is, has it been considered whether to allow JOSM to convert nodes > to ways? e.g. a square, centred on the destroyed node, aligned to the grid, > sized to 25% of the current window, prepopulated with the node's tags and a > predecessor_node.
I think a tag or database attribute (this would obviously need to wait for the next API version) like predecessor=<type:id>[;<type:id>[...]] (e.g. node:84264734) would be useful. It would be specially useful if JOSM added it automatically to ways that are being split, merged etc. There may be arguments that this would be just bloat for the database but in fact it'd just be an improvement to the way history is kept (without bearing on the advantages or disadvantages of keeping history in general). Cheers _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
