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somebody destroyed a dozen of streets in my area how do i find who and restore the data

asked 17 Dec '14, 19:33

Squid3083's gravatar image

accept rate: 0%

edited 18 Dec '14, 02:33


I guess/know there must be dozens of older questions (and answers) about this. I just do not know how to find them now ;-) Hmm,

… I now found those: ways-seem-to-have-vanished, how-do-i-see-the-history-for-my-area and how-do-i-find-and-recover-a-deleted-way and questions about undeletion. Quite everything is explained.

(18 Dec '14, 00:17) aseerel4c26 ♦

I have already located part of it, I think, and it was done about 12 days ago if I remember correctly, The more I look, the more I see areas with many streets that have been deleted. It is in the old terrebonne in quebec, canada the changesets have ways and nodes that are crossed, when i select those crossed ways, I don't see the actual street so will have to look further or look for assistance, probably will be faster and safer

(18 Dec '14, 01:48) Squid3083

and i was looking for similar question but could not find any, sorry

(18 Dec '14, 01:58) Squid3083

for the next time: this help site is not really suited (and not meant) for discussions on a special problem. So, for assistance or collaborative fixing/investigation, it might be best to use IRC, as SomeoneElse suggested, or to use other contact channels such as the forum (into the more or less dead Canada subforum or just the general Q&A).

(18 Dec '14, 01:58) aseerel4c26 ♦

no problem that you did not find the older questions, It also was not easy for me, as mentioned. :-)

(18 Dec '14, 02:01) aseerel4c26 ♦

Oh, and, if you want to discuss a special problem, please link the location. This one?

(18 Dec '14, 02:07) aseerel4c26 ♦

As an aside, I often struggle to find previous answers here too, but as it is indexed by google you can search there using e.g. "deletions site:".

(18 Dec '14, 10:42) SomeoneElse ♦

General note: if we are discussing recent edits, time is of the essence and endless beating around the bush and side tracking the discussion is not helpful at all.

  • provide a link to the area in question (ALWAYS!)
  • if possible provide the relevant changeset with an indication of what is wrong in your opinion
(18 Dec '14, 11:28) SimonPoole ♦

@SimonPoole: to get not dragged into a bush by you, I have slightly modified my comment above. ;-)

(18 Dec '14, 14:02) aseerel4c26 ♦
showing 5 of 9 show 4 more comments

Firstly with regard to finding out what's happened:

I'd probably start by zooming in to somewhere where I know that there was something and use Potlatch 1's "undelete" option to see the way IDs that were deleted. Select a number of those in turn, and look at the history of those to see in which changeset they were deleted and by whom (but don't actually save any changes yet). You can also use other history tools to see what's changed such as the history tab on the website, "WhoDidIt" and ITO's "OSM Mapper".

Once you've found out what's happened, you'll want to put the missing data back:

One option here is a simple revert (using JOSM's revert plugin) of the changesets concerned. I'd typically do this if the changes were recent, and not much has changed in the area. Other options include JOSM's "undelete" option, and Potlatch 1's "undelete" mentioned above. In situations where things were deleted a very long time ago, it might be simplest just to resurvey and remap.

A couple of caveats

  1. Untangling changesets that deleted things that they shouldn't have can get quite complicated - as you'll not want to remove valid additions that were made after the problematical deletions. If you can post a link to the area concerned, someone can have a look and see what's likely to have happened. You may also want to mention the problem on IRC, so that a more real-time discussion about the problem can take place.
  2. It's almost certainly not deliberate vandalism. People often refer to undesired deletions as "vandalism", and in most cases it's just a simple mistake - perhaps someone thought that they were editing their own personal version of the map.
  3. If the roads that you've spotted are missing have been missing since 2012, it might have been data redacted as part of the licence change.
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answered 17 Dec '14, 19:56

SomeoneElse's gravatar image

SomeoneElse ♦
accept rate: 16%

edited 17 Dec '14, 21:33

aseerel4c26's gravatar image

aseerel4c26 ♦


Similar to WhoDidIt: I'd like to add the new (at least on the QA page) tyrasd Latest Changes service (only last week). At least for modified streets this seems to be very handy (if that happened recently). It does not show deletions (if this is meant by "destroyed"), though.

(17 Dec '14, 21:32) aseerel4c26 ♦

For info, in this case I found the offending changeset fairly easily by using the "Load More" button at the bottom of the history tab until I got to 13 days ago and looked for a changeset that just deleted a lot of roads.

Are you going to arrange to have the data restored yourself (perhaps by contacting someone on IRC) or do you want some help with that?

(18 Dec '14, 11:17) SomeoneElse ♦

Latest Changes does not show deletions, so it's less useful for this question.

(18 Dec '14, 15:16) ikonor

@ikonor: Thanks, also for adding this info to the wiki page. In this question here is was only "written" destroyed, so that was not clear if it is about deletions.

(18 Dec '14, 15:27) aseerel4c26 ♦

The changeset in question was likely (view in ACHAVI)

I've reverted it.

As to the rest of this discussion please see my comments made on the original question.

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answered 18 Dec '14, 11:45

SimonPoole's gravatar image

SimonPoole ♦
accept rate: 18%

edited 18 Dec '14, 14:52

aseerel4c26's gravatar image

aseerel4c26 ♦

Thanks Simon!

@Squid3083 and finally just to double-check - does everything look OK in that area now?

(18 Dec '14, 14:57) SomeoneElse ♦

Just in case somebody is wondering: the missing islands have nothing to do with this problem and I've mailed the CA community about the issue

(18 Dec '14, 15:00) SimonPoole ♦

Nicely done!!! I am checking it right now and so far, everything is back ok, big thanks

(18 Dec '14, 17:42) Squid3083
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question asked: 17 Dec '14, 19:33

question was seen: 3,460 times

last updated: 18 Dec '14, 17:52

NOTICE: is being shutdown on 1st March 2024. Please use the OpenStreetMap Community Forum