On 09/04/2023 12:55, Bjoern Hassler wrote:
Hello everybody!
I hope you're having a good weekend. I'm looking for help with
reverting a changeset
https://www.openstreetmap.org/changeset/54488428?way_page=6#map=14/51.5273/-0.1224.
(Kings Cross, London)
The changeset is labeled "Large correction of outdated information",
and while the 'correction' was large, the information wasn't outdated
at all. The editor mistook an extensive set underground paths (labeled
correctly with level, leading to underground railways) for obsolete
footpaths and stripped them all out - removing the entire underground
structure. They hadn't noticed that the same user (me, bjohas) had put
them all in only a year or so earlier (which took me weeks and weeks
to do, sigh).
Obviously a few edits have happened since, but the underground
footpaths haven't been restored/re-added. I'd like to 'cautiously'
revert/merge those edits. However, it does involve many many paths,
nodes etc etc. While I'm a fairly experienced mapper / josm user
(https://www.openstreetmap.org/user/bjohas), I feel that I'd best do
this with support from somebody, to make sure that the initial
destruction doesn't lead to more destruction...
Given that it's 5 years ago that these were deleted, you're not going to
be able to do a simple revert.
What you could do is, where particular things are still missing,
"undelete" the deleted paths one by one and then join up to any current
features (checking for problems with the JOSM validator as you go).
For "undelete" functionality you could use JOSM's "undelete" plugin or
the perl revert scripts' "undo.pl". There may be other options too.
You're going to have to do it one object at a time anyway, so perhaps do
a couple first and then ask again to see if anyone can see any problems
with what you've done?
Best Regards,
Andy
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