[HOT] Is HOT planning to validate this 4 year old project?

Fri Dec 17 19:53:33 UTC 2021

https://tasks.hotosm.org/projects/834 still active, validation and
remapping is taking place now. Some mappers are mapping with outdated
imagery, others are not capable to deal with existing data.

https://tasks.hotosm.org/projects/1788 already archived, completely
validated and mostly overlapping with
https://tasks.hotosm.org/projects/834. How is this possible?
Btw. the road network is absolutely unusable and it is not likely to get
better.
https://www.openstreetmap.org/#map=17/-1.86318/34.72184

https://tasks.hotosm.org/projects/6182
some destructive beginner edits recently. Who cares?

#mapwithai #Tanzania
https://www.openstreetmap.org/#map=18/-4.98441/32.99881

Picking some changesets and looking into the data you'll learn more than
with any statistic.

...

Am 17.12.21 um 13:16 schrieb Benjamin Herfort:
>
> Hey,
>
> just adding a few thoughs on validation and OSM data quality
> implications. It's true that there are probably still to many projects
> in the Tasking Manager that have not been validated. On the other
> hand, it is also important to acknowledge that over the past years
> validation efforts have been improved. (Probably not to the level
> everyone would like to see it, but at least it goes into the right
> direction.) And there are many volunteer validators that work on that
> every day.
>
> The MapSwipe community and HeiGIT are currently working on a project
> funded by American Red Cross, which will allow MapSwipe users to
> validate OSM building footprints. I've briefly talked about this at
> this years HOT summit. It's clear that this will probably not help us
> to prevent low quality buildings edits in the first place. But maybe
> this new MapSwipe project type can help us to validate Tasking Manager
> projects quicker or at least provide a new way to find out which
> buildings need a validation / correction. (During the HOT summit talks
> there were also many other discussions around validation and how it
> can be supported by more analytics.)
>
> For some background information: You can check Tasking Manager stats
> on a HeiGIT's Humanitarian OSM Stats page:
> https://humstats.heigit.org/statistics.html If you scroll down to the
> "Recent Performance" section you get an overview on the share of
> Tasking Manager activity that went into mapping and validation.
> Ideally the dark blue bar would be even bigger than 50%, which would
> mean that more tasks get validated than are newly mapped. If you like
> you can check this also for a few organisations such as Crowd2Map
> (Tanzania Development Trust) or Doctors Without Borders (MSF), which
> are doing relatively well in regard to validation.
>
> Finally, we can also check which projects have been mapped, but not
> validated and are already rather old. E.g. download this file:
> https://humstats.heigit.org/api/export/all/project_progress_sessions_centroid.geojson
> and filter in QGIS:
>
> "progress_mapped" > 0.9 AND "progress_validated" < 0.1 AND
> "start_activity" <= '2017-01-01'
>
> This will give you a list of around 200 projects which are created
> before 2017, mapped to minimum 90% and validated to less than 10%. I'm
> pretty sure that there are other people here in the community that
> have similar approaches to identify these projects. Maybe there is
> something in the Tasking Manager already, I'm not aware of as well.
>
> Have a nice day,
>
> Benni
>
> PS: I've sent that message yesterday already containing some figures,
> but it seems that it didn't get through properly.
>
> disclaimer: I'm working at HeiGIT and are also heavily involved with
> MapSwipe.
>
>
> On 15.12.21 15:56, John Whelan wrote:
>> I've run over the area and deleted a couple of hundred duplicate
>> buildings.  The problem with validating buildings is it takes longer
>> to validate them than map them using JOSM's buildings_tool plugin. 
>> Given teh imagery is often fussy ad the buildings do not generally
>> line up with all the imagery they are a pain in the neck to do.  So
>> not formally validated but has been cleaned up.  My person view is
>> the NGO are after building counts to get an estimated population so a
>> simple rectangle would suffice for their purposes.
>>
>> One other thing I noticed was courtyards in the center of a
>> building.  Fairly common but how  do you may them and more
>> importantly explain to a new mapper how to map them?
>>
>> Cheerio John
>>
>> Mateusz Konieczny via HOT wrote on 12/15/2021 3:24 AM:
>>> https://tasks.hotosm.org/projects/3431
>>>
>>> I encountered more garbage data added on instructions of HOT.
>>>
>>> This is not a problem by itself, as with new mappers it will
>>> occasionally happens.
>>>
>>> The problem is that after four years it is still not validated.
>>>
>>> I would strongly recommend that HOT would use more of its resources
>>> on validating already made edits rather on adding more things.
>>>
>>> Is there some plan to actually validate edits organized by HOT?
>>>
>>>
>>> _______________________________________________
>>> HOT mailing list
>>> HOT at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/hot
>>
>> --
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>>
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