[HOT] The point on the OSM Response to the DR Congo Nord Kivu Ebola outbreak

[Franz-Josef Behr]

Very interesting findings and recommendations, Pierre!

I find it very useful to have some numbers like that, not only vague 
recommendations regarding education.

Best regards - Franz-Josef


Am 07.12.2018 um 06:02 schrieb Pierre Béland:
> The media reported recently about the current Ebola outbreak in Nord 
> Kivu and the difficulty for the humanitarians to operate in a 
> difficult security context with rebels around towns plus population 
> displacements in response to various attacks.
>
> After Beni, the efforts are now concentrated around Butembu. The 
> population of this town is increasing rapidly.The DR Congo health 
> department, the World Health Organization and MSF need good 
> evaluations of population for vaccination campaigns. In this context, 
> OSM-DRC has obtained recent imagery courtesy of USAID that shows many 
> new buildings.
>
> We would like assure a quick response but are faced with quality 
> problems. This week, we started new a job for Bulembo, east of Butembo 
> with new imagery. https://tasks.hotosm.org/project/5585
> With good imagery and a rural area, it seemed to us that this job 
> would fit for newbies.  But we rapidly observed on the map more and 
> more overlaps and imprecise building tracing.
>
> We then used the Irregular shapes indicator that we developped a few 
> months ago to quantify these problems. The indicator offers us a 
> measure of the problem and let us validate the individual buildings 
> reported as needing close evaluation of builidings quality problems 
> (shapes + overlaps).
> https://opendatalabrdc.github.io/Blog/#!index.md 
> <https://opendatalabrdc.github.io/Blog/#%21index.md>
>
> Looking at project 5585, we observe :
> - on dec.5 with beginners, participation, 3,025 buildings were edited 
> but 40.2% with irregular shapes
> - on dec.6 with beginners excluded,  3,471 buildings were edited with 
> only 0.9% with irregular shapes.
>
> The OSM-DRC coordination team is also faced with a high ratio 
> builidngs bad quality + overlaps for the densely town of Butembu : TM 
> 5485, 5487 and 5507.
>
> This is caused by various factors, including dense urban area, dark 
> imagery, different offsets between imagery plus often very imprecise 
> building tracing from newbies.  Observing the multiplication of 
> problems this week for Butembu, including a high ratio of building 
> overlaps with roads, we have decided to archive the current jobs for 
> Butembu. The option seems to start over with the new imagery and first 
> realign buildings and roads before adding new buildings.  And the jobs 
> would be reserved to experienced mappers. The Tasking manager offers 
> options to select intermediate contributors. We should add jobs in the 
> next days to revise Butembu.
>
> We also need to discuss how to better integrate the participation of 
> the newbies  in disaster mapping and at the same time assure both a 
> quick answer and high quality.  Solutions should be proposed to assure 
> that newbies receive an adequate training and how to better monitor 
> their participation.  As coordinators of the response, we dont know 
> where from the newbies come from. Are they simply coming and select a 
> task or participate to a mapathon ? This is hard to say.
>
> Mapathons might be the solution to better supervise newbies 
> participation. But this only if the mapathons organizers accept the 
> responsability to provide high quality data for their group, to offer 
> more training and assure more monitoring of their participants.
>
> regard
>
>
> Pierre
>
>
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