On Mon, May 2, 2011 at 12:55 AM, Nathan Edgars II <nerou...@gmail.com> wrote: > If you can catch the xapi when it's up, > http://wiki.openstreetmap.org/wiki/Xapi#Child_Element_Predicates might be > easier. Unfortunately I don't think you can do both [not(tag)] and > [not(way)], so you'll have to filter in JOSM.
Thanks for this tip. I wasn't sure if the new java XAPI supported these queries. Turns out it does so I can use my own install. It even supports using both predicates together but it apparently OR's them instead of AND'ing them like I would need. But it is entirely practical, with enough memory, to just use [not(way)] to get all free-standing nodes in a large area and then create a JOSM filter like this: "tags:1-999" which filters out all tagged nodes and leaves only empty/unconnected nodes. Turns out there are a lot of them. I had the Kansas bbox handy so that's what I used first. There are just over 2,000. 900 of them are from this OklaNHD user - all in one small area where an OK watershed pokes up into KS. 530 of them are from user "NHD edits" and 440 appear to be from the TIGER import. The last user to touch them is woodpeck_fixbot who I believe removed all the tags from TIGER nodes after they were determined to be a nuisance. The rest (150ish) seem to be incidental. Even found a lonely two last touched (after 4 and 6 revisions) by some user named "NE2" :) For now I think I will just look for the OklaNHD ones and delete them as a group to take care of the specific problem that spawned this thread. Then I may take a look at others. Again, the take-away here is: IMPORTS ARE HARD TO DO RIGHT! So please be careful. "Oh but *my* import will be better!" No. It won't. Not unless you put a *lot* of time into checking, testing, careful and deliberate execution and post-import quality assurance. A LOT of boring and monotonous time. Part of the problem may be with the tools or the OSM platform itself. But that's what we have to work with right now. Patches welcome, I'm sure :) Toby _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
