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

[mohamet lamine Ndiaye]

 Hello everyone,
I am Mohamet Lamine Ndiaye, a founding member of the Openstreetmap Senegal
community and the main contributor on the mapping of the Bâtit at the level
of the suburbs of Dakar.
Thank you Jean Marc for your comments and I think this is the umpteenth
time we talk about it and during your last visit to Dakar you could hold a
training on advanced editing techniques JOSM and quality control with
OSMOSE and this has been a great contribution to the quality of the work.
However, it should be noted that in terms of the quality of the images and
the density of the mapping areas, the contributors find it difficult to
distinguish the actual boundaries of the Buildings from the actual impact
on the quality of the building. Nevertheless, this does not preclude the
use of these data in large-scale and highly resilient projects for the
populations.
The Sunugox project at the level of the Dakar Suburbs in five communes
financed by the European Union is done on the basis of this mapping and the
results were conclusive. Another example, as part of the World Bank's Open
Cities project, the basic data are those that have been mapped by the
community at Saint Louis since 2014. And a work of updates will be done by
the people. speakers at the project level. This is basically what motivates
this work of mapping buildings.
Today, if we have drones imgeries we could make updates but also the fact
that projects use this basic data.
Today, the availability of drone imgeries or the fact that projects use
this basic data could help update the data and also meet the aesthetic
needs.
Other things, you should know that there are neighborhoods that do not
benefit from subdivision and non-harmonized architecture of some lots do
not promote aesthetics.
Having contributed to several activations, the quality of the images and
the level of resolution found in these areas is greater than that of our
countries and this affects the level of detail. So many parameters to take
into account.
What is important for me is that we have to start with something and
although these data are of inferior quality, they respond to operational
needs on the ground in case of disaster or flood for the organizations that
intervene on the zone.Also if we have data released by the cadastre we will
be able to make updates based on the subdivision and this will answer the
aesthetic concerns. For that, an important advocacy work will have to be
done at the level of the public authorities.

2018-07-03 8:46 GMT+00:00 Rupert Allan :

> Two words: Disaster Response
>
> Although OSM will break down without its hard-won reputation for accuracy,
> there is also the case for 'some data being better than no data'. It's the
> old argument, I think, but for us this data is vital, however incomplete.
> We work with aggregated data:
>
> Building materials and standards are used to map: Cholera, Malaria,
> Earthquake risk, general poverty levels, flood risk, vulnerability to
> infection, TB outbreaks, population per building, whether structures are
> temporary (refugee) permanent (hosting community), fire risk (spreading).
> These are practical/technical elements not always at the forefront of the
> digital mind.
> When we plan a $10million intervention with only $3million, we need to
> know the areas where there is most risk.
>
> A simple look at OSM metrics of, say, thousands of grass rooves amongst
> tin rooves in a fire, or hundreds of mud walls instead of concrete in an
> immanent flood, really helps. At this point, this data directly impacts
> and/or saves thousands of lives.
>
> That's my obsession.
>
> Best,
>
> Rupert
> *Rupert Allan*
> Country Manager - Uganda
> E-Mail: rupert.al...@hotosm.org
> Uganda:+256777656999 (mtn) /+256792297795 (africell)
> UK: +447970540647
> Skype: Reuben Molotov
>
>
> *HOT Uganda  *twitter <https://twitter.com/hotosm_uganda> | instagram 
> <https://www.instagram.com/hotosm_uganda/>
>
> *Humanitarian OpenStreetMap Team*
> *Using OpenStreetMap for Humanitarian Response & Economic Development *
>
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>
>
>
>
> On Tue, Jul 3, 2018 at 7:12 AM Lists  wrote:
>
>> I concur with the points made by Jean-Marc Liotier. As Deming said in the
>> 50's, it is important to build quality into the process, not depend on
>> checks after the fact.
>>
>> Along those lines, I still think that we could have an AI program do a
>> big part of the initial mapping.
>>
>>
>> Bryan Sayer
>>
>>
>>  Original message 
>> From: Jean-Marc Liotier 
>> Date: 07/02/2018 10:58 AM (GMT-05:00)
>> To: AMEGAYIBO

Re: [HOT] [Hot-francophone] Tasking ManagerS (Was: {Re: Map4Haiti} + { Project over Grand'Anse})

[mohamet lamine Ndiaye]

Je peux juste que vous me dites si on est sur hot francophone ou pas.
S'il vous plait parler en francais ou bien traduisez pour la majorite des
personnes de cette liste on est pas oblige d'avoir recourt à Google
translate puisqu'on est pas sur une liste anglaise
Merci à vous

Le 24 oct. 2016 5:35 PM, "Cristiano Giovando" 
a écrit :

> Hi Severin,
>
> Thanks for your comment. The goal with project #2252 is indeed to map
> all pre-event information, that is why I put the note to NOT map any
> completely destroyed or uncertain feature/geometry.
>
> The destruction shown in that image is unfortunately very graphic, but
> the fact that many trees have now collapsed, it allows to see features
> like roads and streams that were previously hidden by vegetation.
>
> I have been looking for recent (2015-2016) pre-event imagery that
> covers those areas (as that would be easier for baseline mapping) but
> unfortunately haven't found any that is better registered and more
> recent than Vintage/Bing (which in some areas is 2 to 4 years old).
>
> I also set the requirement for advanced image interpretation skills
> and provided some visual examples in the project instructions tab. Let
> me know if you guys see anything wrong in that approach and examples
> or if you think it may be too challenging for volunteers (even more
> experienced) to trace that imagery.
>
> Also, I mentioned that HOT will not be doing any damage assessment (in
> terms of grading or mapping damage), so since ProjetEOF is already
> engaged in that task through the UAV imagery, I thought you may want
> to consider this imagery as well - and that's why I offered the TMS
> endpoint.
>
> Cheers,
>
> Cristiano
>
>
> On Mon, Oct 24, 2016 at 6:46 AM, Severin Menard
>  wrote:
> > Hi,
> >
> > We should first consolidate pre-disaster data (through Bing + vintage
> > Digital Globe Imagery) before processing post-disaster data, so IMHO the
> two
> > jobs are complementary.
> >
> > Sincerely,
> >
> > Severin
> >
> > On Mon, Oct 24, 2016 at 7:19 AM, Rod Bera  wrote:
> >>
> >> now we've got overlapping tasks.
> >>
> >> http://taches.francophonelibre.org/project/64
> >> http://tasks.hotosm.org/project/2252
> >>
> >> where do we go from here?
> >>
> >> This could/should have been anticipated/prevented.
> >>
> >> Now we should consider trans-TM indexing, as these and other TM
> >> instances are probably here to last.
> >>
> >>
> >>
> >> On 24/10/16 10:07, Cristiano Giovando wrote:
> >> > Bonjour,
> >> >
> >> > (s'il vous plaît excuser mon anglais)
> >> >
> >> > There are three WorldView 3 images available, captured on October 10
> >> > over the Grand'Anse and Sud departments. These have limited cloud
> >> > coverage and show very dramatically the impact of Hurricane Matthew in
> >> > western Haiti:
> >> >
> >> >
> >>
> >> https://beta.openaerialmap.org/#/-74.3994140625,18.521278249360137,10/
> 032210312003?date=month&_k=uvs9ut
> >> >
> >> > We, at HOT would like to create three tasks to update all baseline
> >> > information as shown by those images. I noticed that you guys
> >> > currently have a task over the same area which is using Bing as
> >> > default imagery source:
> >> >
> >> > http://taches.francophonelibre.org/project/64
> >> >
> >> > In order to coordinate our efforts, I would like you to consider this
> >> > project that I just set up and ask you to let me know if you think it
> >> > would make sense to publish it first, since it has that more recent
> >> > imagery:
> >> >
> >> > http://tasks.hotosm.org/project/2252
> >> >
> >> > Right now it's published with low priority, just for you to be able to
> >> > see it. For reference, this is the exact extent:
> >> >
> >>
> >> http://geojson.io/#id=gist:anonymous/5cfec955932472ebd1d23a01421a42
> c5=11/18.4698/-74.4193
> >> >
> >> > Please let me know what you think, also in terms of instructions.
> >> > Happy to discuss or change anything based on everyone's feedback
> >> > before publishing it (bumping it up to high priority).
> >> >
> >> > Also, we will not be doing any damage assessment (as indicated in the
> >> > task), so if you guys have any need to do it, feel free to use the TMS
> >> > services off of OAM. Here's one to browse the same October 10 image:
> >> >
> >>
> >> http://oam-dynamic-tiler-tmp.s3-website-us-east-1.amazonaws.com/
> 57fecc6984ae75bb00ec752c/preview/#19/18.57497/-74.38157
> >> >
> >> > Looking forward to your feedback.
> >> > Thank you,
> >> >
> >> > Cristiano
> >> >
> >> >
> >>
> >>
> >>
> >>
> >> On 24/10/16 11:46, Rod Bera wrote:
> >> > Hi Mikel,
> >> >
> >> >> that's a seperate topic from running an additional unnecessary
> >> >> tasking manager.
> >> >
> >> > to me it's not.
> >> > As I understand things, the fact that a task needs to be
> >> > endorsed/supported by HOT if it is to appear on tasks.hotosm.org is a
> >> > problem. The fact that only co-opted ("trained", "friends") individual
> >> > can