On Fri, Jan 7, 2011 at 4:39 PM, Mike N. <nice...@att.net> wrote: > Recently I encountered a CSI-style mystery. Why was the Skobbler lady (OSM > Nav based) telling people to go jump off of so many bridges? An inspection > showed that the bridges were joined to the interstate highway below, but > many interchanges otherwise had very high quality edits, with attention to > many details. So how did the people who made such skilled edits overlook > false intersections? It turns out that they didn't. A history view shows > the dreaded "Removing duplicate nodes" in the change list. The original > edit just used JOSM's un(G)lue node command, leaving the dupe nodes in > place. A perfectly valid technique until the attack of the duplicate node > bots.
Mike, please don't blame the bot. Ungluing a node an just leaving it there, is really looking for trouble. Some routing engine(s) glue nodes together that are less than a few centimeters from each other. Now you may want to complain that those routing engine(s) are buggy, but that "bug" has historically made things easier rather than more difficult. And going forward, I expect it to continue to be a "feature" rather than a bug. > > Now this is all past history - I think most of the mass and uninformed > duplicate node work in the US has stopped since last year. But, like the > grumpy old man who runs outside and yells at the neighborhood kids who play > in his yard, you can bet that every time I hear the whir and clickety-clack > of anything that sounds like an OSM bot, I'll make sure that they've done > due diligence rather than just relying on only the changeset comment. But > quality bot edits are still welcome! > > P.S. Don't get me started on how the dupe node bots made a 3 minute county > line road fixup into a 30 minute nightmare. > > > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
