[Talk-us] (Cleanup of LABuilding import (was Re: [Imports] Updates:LA County building import (Los Angeles, California, USA))

maning sambale emmanuel.sambale at gmail.com
Mon Aug 1 11:26:01 UTC 2016


Hi,

After validation via TM [0], we will implement a series of cleanup[1]
for several issues during the import.  Details on each cleanup will be
documented in the respective ticket and also updated in the wiki later
on. I'm reading the Automated Edits CoC [2] right now and I have a few
questions.

Some cleanup require manual review by the community like the split
buildings, we are proposing they use their previous import account
(username_labuildings) using a micro tasking interface like
maproulette or to-fix.

Others can be scripted like mistagged condos this requires some
scripting knowledge and we want specific users to do this.

Do we need a separate mechanical edit account or their own import
account is enough to do this?

Ideas welcome.



[0] http://labuildingsimport.com
[1] https://github.com/osmlab/labuildings/issues?q=is%3Aissue+is%3Aopen+label%3Acleanup
[2] http://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct

On Thu, Jul 21, 2016 at 8:56 PM, maning sambale
<emmanuel.sambale at gmail.com> wrote:
> Christoph,
>
> Thank you for the observation.
>
> Specific to "roads now intersect buildings indicating that mapping is
> inaccurate - like here:"
> They are mostly unreviewed TIGER import, I also saw one instance where
> we have building but no roads.
> This was already discussed by the import team and will be fixed during
> the cleanup/validation stage.
>
> Keep your  comments and suggestions coming! Will ticket each one and
> fix whatever we can.
> Thanks!
>
>
> On Tue, Jul 19, 2016 at 8:14 PM, Christoph Hormann <chris_hormann at gmx.de> wrote:
>> On Tuesday 19 July 2016, maning sambale wrote:
>>>
>>> Another round of updates on LABuildings import.
>>> Last week we've imported ~1.1M buildings in LA City. Over 100
>>> usernames participated.
>>> We are close to finishing Phase 1 (LA City) and will continue data QA
>>> and cleanup if needed.
>>
>> A few observations from looking over the map there:
>>
>> * There are quite a few cases where gaps between buildings are either
>> very small (significantly less than a meter) or buildings touch at a
>> single node.  Both are usually artefacts (probably primarily due to
>> roof based rather than footprint based outlines).
>> * There seem to be a lot of cases where garages and sheds are tagged as
>> building=house or building=residential - like here:
>>
>> https://www.openstreetmap.org/way/409191451
>>
>> * In some cases boundaries of pre-existing landuse polygons (like
>> landuse=residential/landuse=industrial) and roads now intersect
>> buildings indicating that mapping is inaccurate - like here:
>>
>> http://www.openstreetmap.org/#map=17/34.07461/-118.48376
>>
>> All of these problems could probably be turned into maproulette tasks or
>> be otherwise worked into QA tools - although at least the first two
>> will require on-the-ground assessment for proper correction.
>>
>> --
>> Christoph Hormann
>> http://www.imagico.de/
>>
>> _______________________________________________
>> Imports mailing list
>> Imports at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/imports
>
>
>
> --
> cheers,
> maning
> ------------------------------------------------------
> "Freedom is still the most radical idea of all" -N.Branden
> https://epsg4253.wordpress.com/
> http://twitter.com/maningsambale
> ------------------------------------------------------



-- 
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
https://epsg4253.wordpress.com/
http://twitter.com/maningsambale
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