So far, data from eHealth Africa Foundation and GEOnet Names Server (GNS) for Nigeria have been imported into OSM
eHealth Africa Foundation database imports
Starting on May 2014, different data from the eHealth Africa Foundation has been imported to the OSM database. Here is a table with the different imports, their status, dates, etc.:
|Import||Short description||Status||Area covered||Number of objects imported||Import user (number of changesets)||Dates|
|10 Northern Nigeria states wards, LGA's and state boundaries import||All State and some LGA boundaries for 10 states of North Nigeria that were imported from Maplibrary were deleted in this import, and replaced with the richer and more accurate eHealth Africa Foundation data.||Finished||Bauchi, Borno, Jigawa, Kaduna, Kano, Katsina, Kebbi, Sokoto, Yobe and Zamfara states.||
|eHealthAfrica_imports (10 changesets)||April 30th to May 6th, 2014|
|26 Central and South Nigeria states plus the Abuja Federal Capital Territory LGA's and state boundaries import||All State and some LGA boundaries for the 26 remaining states of Central and South Nigeria and the Abuja Federal Capital Territory that were imported from Maplibrary were deleted in this import, and replaced with the richer and more accurate eHealth Africa Foundation data.||Finished||All Nigeria except Bauchi, Borno, Jigawa, Kaduna, Kano, Katsina, Kebbi, Sokoto, Yobe and Zamfara states.||
|eHealthAfrica_imports (27 changesets)||May 3rd to 6th, 2014|
|8 Northern Nigeria states residential areas import||All residential areas for 8 states of Northern Nigeria were imported and merged with the existing ones.||Finished||Borno, Jigawa, Kano, Katsina, Kebbi, Sokoto, Yobe and Zamfara states.||
|eHealthAfrica_imports (21 changesets)||May 17th to 20th, 2014|
|1,087 Kano state health facilities import||Import of 1,087 health posts, primary health centres, maternities, clinics and general hospitals of Kano state.||Finished||Kano state.||1,087 nodes||femtope_imports (42 changesets), sameme_import (12 changesets), Owolabi_import (10 changesets), edvac_import (12 changesets) and adeola (3 changesets).||June 19th to July 9th, 2014|
|Extracted places from the residential polygons import||Import of the places names and nodes extracted from the residential areas data for several states of Northern Nigeria.||Work in progress||
|n/a.||Started July 16th, 2014|
|Kaduna State Roads import||The goal is to import all missing roads for Kaduna state with eHealth Africa Foundation data, consisting on 83,370 Km of highways.||Not started yet||Kaduna State.||The original file consists of 4,585,146 objects, of which 3,993,771 are nodes and 591,375 are ways (587,582 are unpaved, 3,793 are paved and 1 in construction). The total lenght is 83,370 km.|
|1,096 Bauchi state health facilities import||Import of 1,096 health posts, primary health centres, maternities, clinics and general hospitals of Bauchi state.||Finished||Bauchi state.||1,096 nodes||femtope_imports and edvac_import||September 2nd to September 29th, 2014|
|508 Borno state health facilities import||Import of 508 health posts, primary health centres, maternities, clinics and general hospitals of Borno state.||Work in progress||Borno state.||508 nodes|
|4,556 Borno state lesser settlements import||Import of 4,556 hamlets, villages, isolated dwellings and neighbourhoods of Borno state.||Work in progress||Borno state.||4,556 nodes|
GEOnet Names Server (GNS) 2009 import
Nearly all of the information from the GEOnet Names Server (GNS) has been imported for Nigeria. The majority of the nodes are place names, but since there is no population data for any of them, place type is defaulted to 'village' with a fixme tag instructing mappers to adjust as appropriate. The places duplicate existing nodes, but few places had been entered for Nigeria at the time of the import.
In addition to place names, the GNS import included other points such as peaks, bays, ruins, etc. The GNS coordinates are only precise to minutes (in DegMinSec format), so in areas with lots of points you'll notice that they may take on the shape of a grid.
River/Stream information has also been imported, although just as points, not as ways. They were imported to help with identifing any rivers traced from satellite imagery. The names tend to be placed near the mouth of a river, or where the river joins another. It's worth noting that if data outlining the waterways is available anywhere, it would be much better to import it than to spend time hand-tracing the rivers. And it probably is available, somewhere.
Mountains/Hills/Peaks do not have their elevations, even though the elevations are available in the GNS data. Whoops. =D Hopefully it will be straightforward to retrieve those nodes via their GNS:id and add the elevation data.
For questions or feedback about the import, contact user DanHomerick (email: firstname.lastname@example.org) or in the discussion for this page.
update on GNS data
As of 2015, much better data are available from the US government. They added arc seconds to the coordinates so the majority of the nodes is now at their appropriate position. Unfortunately, they removed elevation data from their database.
Some of the imported data have been corrected according to the new data in the course of the imports mentioned in the table. But there still remains a huge amount of old data to be verified/changed.