[OSM-dev] Fwd: [HOT] Urgent advanced revert request for Santo Domingo, DO (with 31024 nodes and 394 ways)

[Jean-Guilhem Cailton]

Hi,

My guess is that advanced reverters are likely to be found on the Dev list.

Best wishes,

Jean-Guilhem


-------- Message original --------
Sujet: 	[HOT] Urgent advanced revert request for Santo Domingo, DO (with
31024 nodes and 394 ways)
Date : 	Sat, 14 Jul 2012 21:36:00 -0400
De : 	Jaakko Helleranta.com <jaakko at helleranta.com>
Pour : 	HOT at OSM (Humanitarian OpenStreetMap Team) <hot at openstreetmap.org>



Dear some-advanced-user-of-revert-scripts(?) -- or otherwise an advanced
reverter...

*Long story short: *
I introduced Samuel
<http://www.openstreetmap.org/user/ALCE%20SamuelPaul> to fixing OSM data
in Haiti and the whole Hispanola before the license change bot runs over
us. All things well in Haiti and in Dominican Republic and he and we
together have saved a lot of roads... That is, all well until yesterday...
He ran into some memory problems with JOSM and (without going into
details) while trying to sort it out seems to have ended up accidentally
moving 30+ thousand nodes a tad over 8 meters + applying inadvertently
odbl=clean tag to a hundred or so roads. ... And uploading these to the
server, of course (in two changesets). All this in the Santo Domingo
area in DR=DO.

*To the point:*
*Is there anyone who could try to revert these accidentally messed up
data = uploaded changesets?* .. It seems that the only(?) solution would
be to try to use the Perl Scripts that Frederick Ramm has created -- but
you possible advanced reverters would already know this -- or know of
possible better tools.

The changesets
are  http://www.openstreetmap.org/browse/changeset/12187570
& http://www.openstreetmap.org/browse/changeset/12187477 and it would be
best to revert them completely.

*Few problems articulated and background opened:*
* Earlier attempts to revert:
I and Severin tried to revert these changesets yesterday as soon as I
heard of the problem. Didn't succeed as it seems that the Reverter
plugin of JOSM doesn't work with the new API.
I seeked help today from #OSM IRC and Daeron tried to revert these (or
actually just the latter 12187570) with Frederik's revert scripts
<http://wiki.openstreetmap.org/wiki/Revert_scripts> but ran into dirty
revert problem(s?) if I understood correct.

* About the problem(s)
We first thought that the problem was only the addition of odbl=clean
tags en-masse. However, upon my detailed examination this hadn't
happened as Samuel thought it had.
I discovered however that there seems to be a consistent 8.13/8.38m move
of all(?) of the nodes. .. Which technically has shifted only the nodes
-- but as there are over 30k of them spanning most of Santo Domingo it
means that practically everything in the capital has shifted this 8+
meters. .. And this is the reason that it seems to me that a revert
would be the only way to fix this properly.

* Dirty revert parts:
As far as I can see there are only three possible dirty reverts causing
changesets (currently):
1) My attempt to fix the problem:
http://www.openstreetmap.org/browse/changeset/12222867
2) My fixing of another problem in the area:
http://www.openstreetmap.org/browse/changeset/12222818 - I don't see how
this would collide with the problematic changesets but maybe it's better
just to nuke this too -- it would be very easy for me to redo what I did
here. 
3) a small
changeset http://www.openstreetmap.org/browse/changeset/12207601 that
only has 4 nodes and 1 way with version >1 (visible on the top of the
lists).

I would be super-relieved if someone could figure out how to revert
these -- and would certainly take additional steps in trying to see that
this will not happen again (such as adding more memory to all of the
JOSM instances of our local mappers and going
through uploading procedures in case = when in any trouble like JOSM
memory or connection problems -- especially when dealing with large
chunks of data).

Needless to say that we will not touch the area until we either hear
that someone has reverted all needed changesets / edits succesfully,
adviced on how to try to use the scripts, or given a definitive that
it's not possible in which case we'd move into figuring out solving this
manually. (.. There's luckily decent amount of GPS traces in/from/of the
area.)

Also, if you know of some reverter-wiz, please don't hesitate to pass on
the request. .. And maybe it's a good idea that whoever would
(hopefully) take a crack at this would announce it here to avoid further
trouble..

Sorry for the mess from my part and crossing my fingers & optimistically
thankful in advance,
-Jaakko

--
jaakko at helleranta.com <mailto:jaakko at helleranta.com> * Skype:
jhelleranta * Mobile: +509-37-269154  *  http://go.hel.cc/MyProfile
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