[Imports] Fixing large number of mistagged buildings near Boulder Colorado, US

[Toby Murray]

We have some options to revert changests. There is a JOSM plugin and a
command line script that can be used to revert changests. But really
reverting isn't anything special as far as the API is concerned. All
these tools do is upload a new version of all the objects in the
changeset that put the objects back to their former state. It gets
complicated if they have been edited by someone else since the
changeset you are reverting.

As for having a list of IDs, I did write a simple script a long time
ago to take a list of object IDs and download those objects and stick
them in a .osm file that you can open up and edit in JOSM. At the time
I was running queries against a local API mirror I had running. The
script is on GitHub if you want to look at it.

https://github.com/ToeBee/OSM-misc/blob/master/IDownload.py

Toby


On Mon, Sep 7, 2015 at 11:49 PM, Chris Riddoch <riddochc at gmail.com> wrote:
> Do you think the original mapper would be very motivated to fix this
> number of errors?  That sounds like a pretty demotivating task, if you
> ask me.  Certainly the error is worth mentioning to avoid being
> repeated, but... I already *have* the list of ways that need changing,
> and they all need the same specific change.
>
> I would also have already written an automated edit script, but I saw
> in numerous places of the wiki, as well as being told indirectly on
> IRC, that I should really be talking to someone about this sort of
> thing first.  I looked through what documentation there is about the
> 'osmchange' format on the wiki, but it wasn't clear how to handle
> changes to tags from the description there.
>
> So I ran josm with -Djavax.net.debug=all so that I could analyze the
> format properly.  It looks like it isn't *quite* as simple as just
> providing a file you can just send to the server, because that
> incorporates a changeset ID which is ephemeral.  I also wouldn't want
> to try such a thing without properly testing it first.  So I knew I'd
> need to talk to someone here about how best to do this -- thus, my
> original message.  I came here because I read those wiki pages.
>
> Yes, it's *possible* to fix errors by hand individually using JOSM, in
> the same way it's possible to count grains of rice by hand, but... no,
> I'm sorry, I'm just not motivated to do that.
>
> It sounds like the most useful thing I could do, though, would be to
> help you all develop a mechanism for reverting changesets.  That seems
> a rather important feature for crowdsourced data management.  Should I
> be
> looking at https://github.com/openstreetmap/openstreetmap-website for that?
>
> On Sun, Sep 6, 2015 at 5:28 PM, Clifford Snow <clifford at snowandsnow.us> wrote:
>> That's a lot of mis-tagged objects.
>>
>> I would recommend first contacting the original mapper to see if they want
>> to correct the error. If that doesn't work you could do the work using JOSM
>> or write a automated edit script. The guidelines for automated scripts can
>> be found on the wiki at https://wiki.openstreetmap.org/wiki/Automated_edits
>> with the code of conduct for automated edits at
>> https://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct
>>
>> Using JOSM should be fairly easy, although not quick with almost 8,000
>> buildings.
>>
>> Good luck,
>> Clifford
>>
>> On Sun, Sep 6, 2015 at 2:59 PM, Chris Riddoch <riddochc at gmail.com> wrote:
>>>
>>> Hi, folks.
>>>
>>> I was just looking at what's been mapped locally, and learning QGIS,
>>> and discovered that someone had gone through and traced a really large
>>> number of buildings near me, but most of them were mis-tagged as
>>> apartments.  In fact, I've identified 7869 buildings that are tagged
>>> building=apartments that really should be building=house.  I have a
>>> list of the IDs of the relevant ways that I can provide anyone who
>>> wants it.
>>>
>>> I'm a developer, and know ruby quite well, but I don't know the
>>> specific APIs/file formats involved in sending a large automated edit.
>>> Moreover, I don't want to get it wrong and make things hard for
>>> anyone.  It sounds like the policy for doing this sort of thing is
>>> mostly "talk to someone first," which is what I'm here to do.
>>>
>>> How can I help?
>>>
>>> --
>>> Chris Riddoch
>>>
>>> _______________________________________________
>>> Imports mailing list
>>> Imports at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/imports
>>
>>
>>
>>
>> --
>> @osm_seattle
>> osm_seattle.snowandsnow.us
>> OpenStreetMap: Maps with a human touch
>
>
>
> --
> Chris Riddoch
> http://www.syntacticsugar.org/
>
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