[HOT] eHealth Africa places import

Rafael Avila Coya ravilacoya at gmail.com
Fri Jul 11 19:34:53 UTC 2014

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Hi, Séverin:

The real numbers in terms of wards, LGA's and residential areas for
these imports are actually more modest (the numbers I had were OSM
objects (nodes, ways and relations). I've upgraded the wiki [1] with
the numbers of total wards (2,788) and LGA's (773) for the two
boundaries imports, and the total number of imported residential
areas: 10,968, of which 9,430 are simple polygons and the rest (1,538)
are multipolygons.

All these imports are quite massive anyway, and involve different
kinds of data, all of them of key importance from the
humanitarian/development point of view: up to now, administrative
boundaries, residential areas, health facilities and, already under
discussion in the imports list, the names of

Only health facilities there were around 4,500 in the eHealth Africa
database the last time I checked, but they expect to have from 10,000
to 12,000 when all work is done in the 10 Northern Nigeria target
states [2]. Other interesting kinds of objects could be imported too,
like schools, water facilies, etc.

As far as I know, the only imports in Nigeria previous to the eHealth
Africa ones were the Maplibrary boundaries (only quite bad quality
state boundaries and LGA boundaries for only 3 states or so) and the
2009 GNS data import [3], that amounted 47,812 nodes (and that it's
clear now that it shouldn't have been done in the first place). Only
the eHealth Africa Residential Areas import consists of 387,163 nodes,
that is 8 times more than the GNS import.

I'm really not aware of any bigger data import in any developing
country so far, but the most important for me is, in this context, to
make the imports the best possible quality and the most meaningful for
the organizations working in the humanitarian and development fields.
And I honestly think they are going in the right way.

Apart from continuing with these imports, there is the challenge of
building a strong OSM community in Nigeria, and there is still,
unfortunately, a long way to go.



[2] https://hackpad.com/eHealth-Data-Import-hKeQZhVqQeR
[3] https://www.openstreetmap.org/changeset/2529746

On 11/07/14 11:54, Severin Menard wrote:
> Wow, almost 100,000 wards, 50,000 states boundaries, +400,000 
> residential areas and last but not least +1,000 health facilities! 
> Would it not be the largest import ever made in OSM in a
> developing country? Does someone have other examples to share?
> Sincerely,
> Severin
> On Thu, Jul 10, 2014 at 8:00 PM, Rafael Avila Coya
> <ravilacoya at gmail.com <mailto:ravilacoya at gmail.com>> wrote:
> Hi, Séverin:
> Here you are: 
> https://wiki.openstreetmap.org/wiki/WikiProject_Nigeria#eHealth_Africa_Foundation_database_imports
> Cheers,
> Rafael.
> On 10/07/14 15:57, Severin Menard wrote:
>> Hi Rafael,
>> Would be great to have stats about what is imported so that we
>> can figure out how many objects of each kind this represents.
>> Sincerely,
>> Severin
>> ---------- Forwarded message ---------- From: *Rafael Avila
>> Coya* <ravilacoya at gmail.com <mailto:ravilacoya at gmail.com>
> <mailto:ravilacoya at gmail.com <mailto:ravilacoya at gmail.com>>> Date: 
> Thu, Jul
>> 10, 2014 at 5:56 AM Subject: [HOT] eHealth Africa places import
>> To: "hot at openstreetmap.org <mailto:hot at openstreetmap.org>
> <mailto:hot at openstreetmap.org <mailto:hot at openstreetmap.org>>"
>> <hot at openstreetmap.org <mailto:hot at openstreetmap.org>
> <mailto:hot at openstreetmap.org <mailto:hot at openstreetmap.org>>>
>> Hi all:
>> After the import of the boundaries of all wards, LGA's of 10 
>> Northern Nigeria states [1] and the LGA's of the rest of states
>> of that country [2], the import of the residential areas of 8
>> North Nigeria states [3] and the import of 1,087 health
>> facilities in Kano state [4] from the eHealth Africa Foundation
>> database, next in the queue is the import of place nodes
>> (villages, towns and suburbs/quarters in big towns and cities)
>> extracted from the residential areas polygons.
>> This import will be done, state by state, through specific jobs
>> in the Tasking Manager, in a similar way to the Health
>> Facilities import.
>> For that purpose, we have created an import wiki [5] and a 
>> workflow wiki [6] to show the steps that mappers will have to 
>> follow for this import.
>> This import is a bit tricky, as we have to merge these eHealth 
>> Africa data with the OSM database that is full of place nodes
>> from the controversial GNS 2009 import. So I would kindly ask
>> the community to review the import wiki and the workflow wiki
>> for possible issues, improvements, modifications and
>> corrections.
>> To help you check the data, I uploaded the following three files 
>> to ge.tt <http://ge.tt> <http://ge.tt> [7]:
>> 1) eHealth_Africa_Places_KANO.osm (data to be imported - 2,084 
>> nodes) 2) kanoTownsAndCitiesFINAL.osm (it's the residential
>> areas data that we imported into OSM, before merging it with the
>> OSM database) 3) OSMdatabasePlaceNodesKano20140710.osm (for your 
>> convenience, this are the places nodes we have in the OSM
>> database (most of them from the GNS 2009 import), so you don't
>> have to download all Kano data and filter)
>> Best,
>> Rafael Ávila Coya.
>> [1]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Boundaries
> [2]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Boundaries_(2)
> [3]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Residential_Areas
> [4]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Kano_Health_Facilities
> ,
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Kano_Health_Facilities_Workflow
> and http://tasks.hotosm.org/job/566
>> [5]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Places
> [6]
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Places_Workflow
> [7] http://ge.tt/2TSqWjn1
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