On Mon, Oct 18, 2010 at 8:38 PM, Ian Dees <[email protected]> wrote: > On Mon, Oct 18, 2010 at 7:32 PM, Nathan Edgars II <[email protected]> > wrote: >> >> On Mon, Oct 18, 2010 at 8:15 PM, Ian Dees <[email protected]> wrote: >> > Ways and relations are equally easy to "break" >> >> Nope. They're not, because relation membership is not a tag on the >> way. > > Yes, they are, because a relation membership and new way (with new tags and > node refs) are both completely separate new entities that need to be > uploaded. If an editor can reliably do it with a new way then it can also > reliably do it with a new relation member.
When a way is downloaded from the API, its tags are all downloaded, but a separate API query has to be sent to get any referring relations. > >> >> A way is always uploaded with its tags, > > Yes, but the new (split) way is not necessarily always uploaded. Relations are uploaded after new ways to avoid precondition failures. Thus it's much more likely that a connection will fail between the way and the relation than between two ways. I've seen Potlatch take several tries to upload a large relation, which compounds the possible problem. It's also obvious from the map when a portion of a way is accidentally deleted, but even if relations were used to render shields an error would not always be obvious. I have seen these problems in my work on repairing relations. Do you have any such experience? _______________________________________________ Talk-us mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-us
