[HOT] West Africa Ebola Activation : follow-up

Rafael Avila Coya ravilacoya at gmail.com
Wed Sep 3 14:19:38 UTC 2014

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Hi Andrew and Pierre:

The idea would be more or less like this:

Download the 4,500 target polygons with overpass or similar. Maybe one
of you who know the area where they are can do it.

Then I would generate an osm file with the script (it works with ways
as well as with relations). This osm file would have only the nodes
for the place, with the name tag and the kind of place, based on the
area. At this moment, the script decides only between village or town,
depending on the area (because that was the only need for that
specific Nigeria import), but I guess it wouldn't be difficult to
tweak the code to produce other kind of places, like hamlet or city.
Alternatively, we could just set the place tag as place=fixme or
something, and let the contributors decide which is the most suitable
node by node, although that would slow the process.

The job could be set to be done with the TM, similarly as with the
UNICEF import in CAR, or the eHealth Africa Health Facilities imports
in Nigeria. Example: http://tasks.hotosm.org/project/637 A user takes
a task and checks node by node that they are ok, and reports any
problem in the task comment (if a node was already in OSM, it ignores
it (deletes it)). I've set already a few jobs of this kind (the last
one a few days ago only), so I can do that myself if you want.

Finally, once all the job is finished, we can download the polygons
again with overpass or mirror download, delete all the names for the
residential polygons at once using filters and upload the changes.

I maybe missing something here, anyway...



On 03/09/14 21:24, Pierre Béland wrote:
> Hi Rafael,
> this script look interesting, taking care to remove the tag and 
> place it on a node.
> Since there might be names around to reconcile with, this import 
> cannot be done mecanically.
> There are some 4,500 of these places on polygons. To share this 
> task among many contributors, I think that a good solution would
> be that the output of your script split the list of polygons +
> places, with a maximum  of 100 polygons / places per file,
> This way, the JOSM Todo plugin would let go rapidly through the 
> list of place nodes, merge with an other place if appropriate and 
> upload the result to the OSM database.
> Is this make sense?
> Pierre
> ------------------------------------------------------------------------
*De :* Rafael Avila Coya <ravilacoya at gmail.com>
> *À :* hot at openstreetmap.org *Envoyé le :* Mercredi 3 septembre
> 2014 2h25 *Objet :* Re: [HOT] West Africa Ebola Activation :
> follow-up
> Hi, Pierre:
> I wonder if you thought about replacing the names on the 
> residential polygons by a node in their centroid automatically 
> using a script.
> I created one for a similar task: the import of place names for 
> several states in North Nigeria, still a work in progress [1]. For 
> that, I wrote a script that extracts the names of the places and 
> creates an osm file with the nodes.
> If needed, I can tweak the code to make one for this ebola task.
> Cheers,
> Rafael.
> [1] 
> https://wiki.openstreetmap.org/wiki/Import_Nigeria_eHealth_Africa_Places
On 03/09/14 06:45, Pierre Béland wrote:
>> From march to sept. 1,  there are 1,201 OSM contributors who 
>> edited 6.7 million objects for Guinea, Liberia and Sierra Leone.
>>  But reading the news, you understand that we cannot stop there.
>>  Humanitarian organizations are operating in a very difficult 
>> context and count on our support. We receive constantly messages
>>  of gratitude, people saying how useful is this information for 
>> them plus all the export services provided.
>> Plus a vast plan of support by the various UN Agencies is 
>> presently organized. Andrew Buck and I ha today a meeting with 
>> GIS staff from World Health Organization (WHO), Office for the 
>> Coordination of Humanitarian Affairs (OCHA) and the World food 
>> program (WFP). After looking at the various possibilities, it
>> has been proposed to use OpenStreetMap for the base map of the 
>> various agencies.
>> In this context, it will be important to revise / complete both 
>> administrative boundaries and populated places.
>> To plan their intervention, the humanitarian organizations need 
>> administrative boundaries at various levels of administration and
>> the Populated place names. We have already revised the  the 
>> counties and added district boundaries for the Liberia and are 
>> looking at the other countries.
>> If any of you have contacts in Sierra Leone or Guinea to try 
>> obtain administrative boundary files with the appropriate
>> license for OSM, this would greatly help.
>> For the populated places, we agreed to move any place name which
>>  is on a residential polygon to a node. This will simplify the 
>> synchronization with the databases of our various partners. We 
>> are also looking at adding a pcode like we did for Haii in 2010. 
>> There are 4,500 place tags on residential polygons to be 
>> converted to nodes.
>> Plus there are two Task Manager jobs still to be completed to 
>> import place names for Liberia and Sierra Leone. These two tasks
>>  needs some care and we are asking again for contributors 
>> familiar enough with JOSM to contact either me or Andrew. Since 
>> these are private jobs restricted to a few persons, you need to 
>> provide us you OpenStreetMap account. 
>> http://tasks.hotosm.org/project/617
> <http://tasks.hotosm.org/project/617>
>> http://tasks.hotosm.org/project/619
>> Blake Girardot can also help people to learn this process.
>> For those that prefer to do general mapping, digitizing from Bing
>> Imagery, look at the task for Eastern Liberia counties. As the
>> epidemy is still progressing, we will also add task for the 
>> north-east Nimba county. http://tasks.hotosm.org/project/624
>> Pierre
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