There /may/ be a way using josm's revert changeset.
Load the changeset using the revert changeset tool.
Use filters to select only the required data (start with layer<0).
When you have only the objects you require, select them. Then go to the
revert changeset dialog again & select the 'revet selection only &
restore deleted object' option.
Hopefully being underground the objects won't be attached to as many
other objects & not cause too many conflicts.
As suggested, try one or two objects first.
Genuinely surprised it still loads in OSMcha
https://osmlab.github.io/changeset-map/#54488428
DaveF
On 09/04/2023 16:47, Andy Townsend wrote:
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The changeset is labeled "Large correction of outdated information",
and while the 'correction' was large, the information wasn't outdated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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