[HOT] Road tracing in North Nigeria and eHealth Africa data imports

Rafael Avila Coya ravilacoya at gmail.com
Tue Apr 29 10:48:45 UTC 2014

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Hi, Oliver:

Thank you very much for your answer and for your offer to help.

We have already wrote two wiki pages for two boundaries imports. We
have already one script for data conversion, but we have to make sure
the original shapefiles come without errors. I don't know if you have
any thoughts about this.

In any case, as a first step, I will send you in a different email the
data I used for testing for the Ajingi LGA, and also the data for the
whole Kano State (without the POI's that I don't have right now in my
laptop), so you can play and see by yourself how the data looks.

Best regards,


On 28/04/14 17:32, Oliver Sjöberg wrote:
> Hello Rafael.
> I'd like to begin to thank you for doing such fantastic work.
> After reading your mail I'd like to offer some help with this
> tremendous task. I read trough both Hackpads and are quite aware of
> the possible issues with automating the data import. My initial
> thought was that the data could be graded based on missing
> attributes and sorted out in more manageable dataset which are
> processed prioritized by its quality. It might not be much but the
> lower quality data could be fed back to eHealth with a request to
> update the data when the geographic location is visited during
> their primary operations.
> Either way - I'd like to help in some way but I'm not requesting
> you to tell me exactly what to do. So rather speak to you first
> before I'd get going on my own with the fear of doing unnecessary
> or even damaging work. As I'm quite proficient in FME and other GIS
> related tools I wouldn't hesitate to try battling some of the
> automation issues.
> Best regards Oliver Sjöberg
> Rafael Avila Coya skrev 2014-04-28 14:54: Hi all:
> As you may remember from a thread about a month ago, there is a
> NGO, eHealth Africa ( http://ehealthafrica.org ), that asked for a
> job to be created in the Task Manager for tracing the roads of Kano
> state in N Nigeria ( http://tasks.hotosm.org/job/474 ), to help
> vaccination teams trying to eradicate the polio in 10 states of N
> Nigeria. As the job wasn't being done in a proper way, specially
> road tagging, I sent them some emails telling they had to both get
> some training and have a consistent tagging reference (find here
> the road proposal I made, and that was said to be fine by the
> people interested in mapping Nigeria: 
> https://hackpad.com/Proposal-of-road-tagging-system-for-Nigeria-5YvMa3u2bqE
>  , that we are already using as reference). I volunteered to come
> to help with that, and ended up being hired for a month. I am
> therefore in Kano, Nigeria, since two weeks ago.
> The road tracing is in itself a huge and very interesting job, and 
> they are planning to follow that job with all northern states of 
> Nigeria. But as I landed here, I discovered that eHealth Africa has
> a huge and awesome set of data, with millions of GPS points, lots
> of well traced residential areas (more than 2,400 for Kano state
> only), all wards, LGA's and state boundaries for those 10 states
> plus all LGA's and state boundaries for the rest of Nigeria, more
> than 100,000 nodes with place names, location of hamlets, health
> facilities, schools, water facilities, mosques, market places,
> etc.
> All that data (except for the boundaries of the states not included
> in the 10-North-states-list), has been gathered in the field, using
> lots of GPS-enabled devices, by eHealth teams of around 60 people
> during the last 2 years, and they gave us full permission to import
> all that data to OSM (I have with me the HOT document of
> authorisation). I've been assessing all that data to see what could
> be imported to the OSM database and how, and wrote a hackpad about
> it: https://hackpad.com/eHealth-Data-Import-hKeQZhVqQeR
> If anyone wants to test that data, just let me know and I give you
> the link to it.
> Any comments, help or ideas are very welcome.
> Cheers,
> Rafael. -- Twitter: http://twitter.com/ravilacoya
> --------------------------------
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- -- 
Twitter: http://twitter.com/ravilacoya

- --------------------------------

Por favor, non me envíe documentos con extensións .doc, .docx, .xls,
.xlsx, .ppt, .pptx, aínda podendoo facer,  non os abro.

Atendendo á lexislación vixente, empregue formatos estándares e abertos.

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