Re: [OSM-dev] How reconstrucing a way from the history?
Thomas Wood wrote:
[updating way when node moved]
However, I think potlatch does work in this way..
It does in 0.5 but won't in 0.6.
This does make it a bit more difficult in 0.6 for Potlatch's way revert tool
('H') to figure out what the revision dates were, which is what I'm working
on at the moment.
cheers
Richard
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Re: [OSM-dev] How reconstrucing a way from the history?
On Jan 12, 2009, at 13:45, Nevel Gandish wrote: And can I be sure that when moving a node caused a new history entry for the node and the way that both have the exact timestamp or might they differ by a few seconds? Just moving a node doesn't create a new history entry for the way, I think. Cheers Robert ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] How reconstrucing a way from the history?
2009/1/13 Robert Vollmert rvollmert-li...@gmx.net: On Jan 12, 2009, at 13:45, Nevel Gandish wrote: And can I be sure that when moving a node caused a new history entry for the node and the way that both have the exact timestamp or might they differ by a few seconds? Just moving a node doesn't create a new history entry for the way, I think. Um, that seems true indeed. I just assumed it would. Nevel ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] How reconstrucing a way from the history?
2009/1/13 Nevel Gandish koanti...@googlemail.com: 2009/1/13 Robert Vollmert rvollmert-li...@gmx.net: On Jan 12, 2009, at 13:45, Nevel Gandish wrote: And can I be sure that when moving a node caused a new history entry for the node and the way that both have the exact timestamp or might they differ by a few seconds? Just moving a node doesn't create a new history entry for the way, I think. Um, that seems true indeed. I just assumed it would. Nevel However, I think potlatch does work in this way.. -- Regards, Thomas Wood (Edgemaster) ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
[OSM-dev] How reconstrucing a way from the history?
Hello! I currently try to reconstruct ways from the history. Retrieving the ways is no problem. Retrieving nodes from the history isn't too. But how to put them together? Not every node has a entry for every entry in a ways history. Is figuring out by comparing the timestamps the right method or is there a better one? And can I be sure that when moving a node caused a new history entry for the node and the way that both have the exact timestamp or might they differ by a few seconds? Besides this, when reconstructing a way consisting of 100 nodes I've to make 100 calls to the api to retrieve the node histories. Wouldn't something like GET /api/0.5/nodes/history?nodes=id[,id...] or GET /api/0.5/nodes?nodes=id[,id...]+history be better for the server? Thanks you! ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] How reconstrucing a way from the history?
Hi, Nevel Gandish wrote: I currently try to reconstruct ways from the history. Retrieving the ways is no problem. Retrieving nodes from the history isn't too. But how to put them together? Not every node has a entry for every entry in a ways history. Is figuring out by comparing the timestamps the right method or is there a better one? I would suggest you download an old planet file that contained the right data and extract the data from there; this gives you a (relatively) consistent set of ways and matching nodes, and causes less strain on the API. You cannot rely on ways and nodes having identical timestamps. Bye Frederik ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
