[HOT] Recent building mapping in Malawi

[john whelan]

I think some projects / maperthons are better organised than others.

The low hanging fruit for project managers is manage your project and some
how get your hands on a tool to catch the errors early.  A manual validator
with JOSM if you can find one works extremely well for data quality.

Cheerio John

On 11 Nov 2017 5:23 am, "Bjoern Hassler" <bjohas+mw at gmail.com> wrote:

> Hi John, hi Frans,
>
> We did write a basic tool that can pick up errors new mappers are making:
> https://github.com/OSM-Utilities/JOSM-Scripts-HOT
>
> It's meant to do exactly what you say: Spot issues as soon as possible,
> i.e. ideally during a mapathon or at the start of a new campaign. The tool
> presents an analysis not by changeset or completed tile, but by user
> (directly from OSM), and e.g. gives you the percentage of non-square 4-node
> buildings per user. It can also check a number of tags. We've used this at
> Cambridge mapathons to identify new mappers that systematically don't
> square buildings. (It obviously cannot tell the size of buildings relative
> to imagery.) We also use it to identify new mappers that are not mapping a
> lot during the mapathon, and may therefore need extra help and
> encouragement to have a good experience (and would thus be more inclined to
> come back).
>
> We'd be very happy to help you (and whoever else is interested) get it set
> up!
> Bjoern
>
>
> On 11 November 2017 at 08:59, Frans Schutz <frans.schutz at gmail.com> wrote:
>
>> You are right.
>> I see that as often as well. For sure  beginners who start with ID and
>> even start validating after a few Mapping sessions in which the most
>> elementry taggings went wrong. It would help if there is a mechanism in HOT
>> task mgr which not allows to start validating from ID or when a mapper has
>> les than a minimum level.
>> Frans
>>
>> Op vr 10 nov. 2017 om 15:14 schreef john whelan <jwhelan0112 at gmail.com>
>>
>>> I'm currently adding tags to some 1,500 buildings in Malawi.  Many are
>>> from recent HOT projects.  I dislike validating building projects since I
>>> never really know what to do with buildings that are three times the size
>>> of the image and not square either but if someone could just run JOSM
>>> occasionally on the project tiles for these sort of projects and give
>>> feedback to the mappers that they really should tag their buildings that
>>> would help enormously and the quicker you pick up the new mappers and
>>> correct them the less work there is to do later on.
>>>
>>> It isn't just Malawi by the way but most of these are less than a dozen
>>> buildings per mapper and they all have to be visually checked.
>>>
>>> Thanks John
>>> _______________________________________________
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>>> HOT at openstreetmap.org
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>>>
>> --
>>
>>
>>
>>
>> Frans
>>
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>>
>
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