Query Key,Value Pair From Nominatim "Coverage"

Question

I have spent about , 26 minutes, looking for a resource that would allow me to query ,key value pairs , on the Nominatim page to check what type of coverage the city has? (I.E if it is a polygon?)

EXAMPLE

Bellevue, Washington https://nominatim.openstreetmap.org/details.php?place_id=172952334

Type    boundary:administrative
Last Updated    2017-06-20 21:45
Admin Level 8
Rank    City
Importance  0.470508128507761
Coverage    Polygon

Where would I even go for this information? "The information that I am looking for is the key, value pair of "Coverage"

What I have searched for:

I looked on this page and was not able to find it because "Coverage" is not a tag. Databases and data access APIs

I know it says this "Quite a few people break this file down into smaller files for different regions and make extracts available separately on mirror servers. Various tools are available to cut the Planet file up into smaller areas if required."

One solution that I that I have found is to setup Nominatim db on a server which I do not want to do if I necessarily do not have too.

Other Solutions

Maybe I can query this with osmosis? But from what I read that , it does is allow you manipulate shape files. If what I seek is not in a shape, how would I be able to know beforehand? Would it not be useful to know what actual shapes are in the file before you manipulate it? Maybe this exists?

That is why I would like to look them up in a nominatum query by coverage. I simply would like to check if a list of city names exist as a polygon against the nominatum api. ( I.e Python: for i is in Mylist: return True) http://wiki.openstreetmap.org/wiki/Osmosis/Detailed_Usage_0.43#Default_Arguments

Maybe I suck at searching, I apologize in advance.

Answer 1

3

The database query Nominatim runs is (simplified) SELECT name->'name' from placex where admin_level=8 and ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') AS isarea where ...;

Without setting up a Nominatim database you won't be able to run such a query against a whole country.

The next best would be to run queries against the Nominatim API http://nominatim.openstreetmap.org/search.php?city=bellevue&country=united+states&format=jsonv2&polygon_geojson=1 and check the type of the geometry value ('Point', 'Polygon', 'MultiPolygon').

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answered 10 Aug '17, 15:40

mtmail
4.8k●15●74
accept rate: 27%

@mtmail Thank you for your reply. When you say "check the type of the geometry value of each api call ('Point', 'Polygon', 'MultiPolygon')", would that not be computationally expensive and would I not be breaking the terms of service for nominatim? I would then have to parse each query to see if it contains a certain geometry.I think setting up the database, may be the way to go. Does Nominatim have a fuzzy search for the names? I saw this https://github.com/komoot/photon

(12 Aug '17, 03:56) Chris_L

Query Key,Value Pair From Nominatim "Coverage"

EXAMPLE

What I have searched for:

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