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

Rafael Avila Coya ravilacoya at gmail.com
Thu May 1 12:11:47 UTC 2014

Hash: SHA1

Hi, Pierre:

Thank you for sharing your comments.

We are actually importing the boundaries at the ward level (see for
example this area of Jigawa and Yobe states that have already their
inner boundaries imported to the OSM database:
http://osm.org/go/wSyuEK4-- ) following the corresponding import wiki:

About the tagging, we decided to use place=district and addr:district
for LGA's (admin_level 6) and place=municipality and addr:municipality
for the wards (admin_level 8) for consistency with worldwide tagging.

addr:distric redirects to this wikipedia page:
http://en.wikipedia.org/wiki/District . We found that definition quite
matching what an LGA is in Nigeria. And wards are, for their size, and
discussing with people that have travelled through all these states
for the last 2 years, quite equivalent to what we know as municipality
in European countries.

The other alternative would be to use place=lga plus addr:lga and
place=ward plus addr:ward, but 'lga' is not a documented (and probably
not used at all) tag, and ward looks to be meant for areas inside a
metropolitan area.

We haven't still not used those place and addr: tags so far, and I
wonder if any has used them for address tagging in Nigeria, so any
comments about this (and anything else) are very welcome.



On 01/05/14 07:24, Pierre Béland wrote:
> Hi Rafael,
> This is awesome all of this. You are doing a great job with the
> highway classification.
> In the Hackpad, the territorial division is presented with States
> LGA's and Wards levels. Boundary limits could be easily add for
> each if you have the limits. But I dont understand the proposition
> to use new values Places tag classification (ie. place=district and
> municipality).
> Pierre
> ------------------------------------------------------------------------
*De :* Rafael Avila Coya <ravilacoya at gmail.com>
> *À :* "hot at openstreetmap.org" <hot at openstreetmap.org> *Envoyé le :*
> Lundi 28 avril 2014 14h54 *Objet :* [HOT] Road tracing in North
> Nigeria and eHealth Africa data imports
> Hi all:
> As you may remember from a thread about a month ago, there is a
> NGO, eHealth Africa ( http://ehealthafrica.org
> <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 <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.
> _______________________________________________ HOT mailing list 
> HOT at openstreetmap.org <mailto:HOT at openstreetmap.org> 
> https://lists.openstreetmap.org/listinfo/hot

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