Who stole the bridge: What used to be within bounding box? [SOLVED]

General talk
1

User zooms in and swears there used to be a bridge across the river but it is now gone.
However user might be suffering from Alzheimer’s disease and thus was imagining things.
If this was Google, one could merely click on Historical imagery and find out.
But this is OSM.
User tries https://wiki.openstreetmap.org/wiki/Quality_assurance#WhoDidIt
but they don’t work (for him).
User just wants to know what has changed within a bounding box. Thanks.

2

I see. One can use it, but by trial and error.
https://github.com/simon04/whodidit/issues/36

3

If you know the date, then Overpass turbo has a template that can be loaded, called “Attic date query”.
It’s a matter of navigating to the place of interest (small areas only!), then changing date atop of the query box, optionally but very recommended - commenting out querying for relations (as it takes much more time).

Example: http://overpass-turbo.eu/s/JRH

Video: https://www.facebook.com/groups/500589303317858/permalink/2293977197312384/

4

Thanks, alas my query gets nothing.

5

Well https://www.openstreetmap.org/way/228962647 is a bridge but presumably not the one that you’re looking for?

Using “Potlatch 1 undelete” (URL https://www.openstreetmap.org/edit?editor=potlatch&way=228962647#map=18/24.19312/120.85673 - note that “editor” there is set to “potlatch” not “potlatch2”) I was able to find https://www.openstreetmap.org/way/217873380/history - that’s the only deleted way in the area that I can see but it’s clearly not a bridge.

Your attic data query won’t find anything from 2010 because I don’t think that date queries go back that far; I think you need to use dates after 2012 only.

6

Thanks. Ah no wonder,
the user guessed he was looking for objects made after 2012 when in fact he was looking for objects made before 2012.

7

Overpass API database was initially populated with the first ODbL compliant planet file from September 2012. So any object version, which did no longer exist in September 2012 (because it was replaced by a more recent version) won’t be available in an Overpass API attic query.

8

Are you sure there was some data which survived the license change back in 2012, or was even created before 2013? It doesn’t seem to be the case.

9

(The problem is simply that the user (me) thought
that saying 2012 would get all the changes after 2012,
when in fact it gets only changes before 2012.
Therefore I filed
https://github.com/tyrasd/overpass-turbo/issues/427
to encourage them to make it more clearer to users.)