[HOT] Why the HOT obsession with low quality buildings in Africa ?

[Vao Matua]

When you say "low quality" buildings, do you mean the quality of the
polygon data or are you judging someone's home to be of low value?

On Mon, Jul 2, 2018 at 1:24 AM, Jean-Marc Liotier <jm at liotier.org> wrote:

> Active in Senegal and Mali, I have noticed that changesets tagged with
> tasking-manager HOT projects produce very large numbers of buildings.
> Those buildings appear to be of very low quality. I wonder: who uses
> this data ?
>
> If it is only necessary to assess that people live there, then a
> landuse=residential is sufficient
>
> If it is necessary to count the number of dwelling units to infer
> population, then a node is sufficient (maybe along with an attribute to
> discriminate single or multi-tenancy)
>
> If the geometry is actually necessary, then I wonder if anyone is
> satisfied with those semi-random shapes that, with some optimism, may be
> identified as being in the vicinity of actual buildings (most of the
> time)
>
> Enthusiastic contributors expend an awful lot of effort in flooding the
> map with low-quality buildings. I have seen ruins, building parts,
> walls, vague shadows on the ground, rubbish heaps, market stalls, cars
> and trucks all tagged as buildings - and I'll charitably keep from
> commenting on the geometric quality of those that attempt to map actual
> buildings (and I'll leave aside the issue of HOT leads requiring the use
> of outdated imagery such as Bing instead of ESRI World in Bamako). Is it
> the most useful way to channel the energy of inexperienced contributors
> ?
>
> I often find myself wishing that HOT leads introduce them to
> Openstreetmap through Osmose quality control rather than by churning out
> buildings like demented stonemasons trying to reach their weekly quota
> of gamified task-managing !
>
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