[HOT] Admin Boundary Extraction Service

[Dale Kunce]

Samuel,
There is this service I discovered a few days ago.

https://osm.wno-edv-service.de/boundaries/

Can't speak to its quality yet though.

Dale

On Sun, Nov 8, 2015 at 3:30 PM, Rafael Avila Coya <ravilacoya at gmail.com>
wrote:

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> Hi, Samuel:
>
> Here you have an overpass query to get all boundary relations for all
> states, LGA's and wards of Nigeria, with the admin_centre's and label
> of each relation when available: http://overpass-turbo.eu/s/cxp
>
> If you want Nigeria country boundary relation too, just change "4|6|8"
> by "2|4|6|8". In case you want for example only states and LGA's, just
> do "4|6", and so on.
>
> In case you want only the boundaries for a certain state, you can use
> this query (this example is for Kano state):
> http://overpass-turbo.eu/s/cxt
>
> In case you don't want the admin_centre's nor labels nodes of any
> relation, you have to run a different query. This one is for Kano:
> http://overpass-turbo.eu/s/cxs
>
> Whenever possible, I advise to use area codes instead names. For
> example, Niger is the name of a state in Central Nigeria, but it's
> also the name of Nigerias north neighbour country: Niger.
>
> Getting the area code is simple: go to osm.org, search for the area
> you are interested in (example Niger), get the relation id we want (in
> our case, let's say we want Nigeria's Niger state relation id, so we
> click in "State Boundary Niger, Nigeria" link, not in "country,
> Niger"), and then we copy it's id (in our example 3718384), and we add
> 3600000000 + 3718384 = 3603718384 to get the Niger state area code for
> overpass queries: (area:3603718384)
>
> To avoid a query to overload your web browser, instead of hitting
> "run" button, click in "Export" button instead. There, go to "Query"
> and then click on "compact" in the "convert to (compact) OverpassQL"
> link. That will open a new window with a compact OverpassQL link.
> Click on it and it will make the query and download directly in your
> file system the result of the query. For example, for the last example
> query (Kano state boundaries without admin_centre's nor labels), the
> link is like this one:
>
> http://overpass-api.de/api/interpreter?data=%5Btimeout%3A250%5D%3B%28relation%5B%22boundary%22%3D%22administrative%22%5D%5B%22admin%5Flevel%22%7E%224%7C6%7C8%22%5D%28area%3A3603710302%29%3B%29%2D%3E%2ErelBoundary%3B%28way%28r%2ErelBoundary%29%3B%29%2D%3E%2EwaysBoundary%3B%28node%28w%2EwaysBoundary%29%3B%29%2D%3E%2EnodesBoundary%3B%28%2ErelBoundary%3B%2EwaysBoundary%3B%2EnodesBoundary%3B%29%3Bout%20meta%3B%0A
>
> If you need any more sofisticated query, just let us know:
>
> Cheers,
>
> Rafael.
>
> On 08/11/15 12:00, Samuel Aiyeoribe wrote:
> > Hello HOTties,
> >
> > Please does anyone know of a service for extracting/downloading
> > OSM Admin Boundary that one can fork and host myself and also
> > available on github.
> >
> > Looking forward to your reply.
> >
> > Cheers
> >
> > Samuel
> >
> >
> > _______________________________________________ HOT mailing list
> > HOT at openstreetmap.org https://lists.openstreetmap.org/listinfo/hot
> >
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-- 
sent from my mobile device

Dale Kunce
http://normalhabit.com
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