Details on the OpenStreetMap to Qiekub matching algorithm.

TLDR: Add as many permanent tags as possible to OpenStreetMap.

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How we match places from different sources (eg. OpenStreetMap).

If possible, use the following list to find a matching place. The place with the highest score is the best match.

(The current implementation can be found here: https://github.com/qiekub/api/blob/master/functions/osm/loadChanges.js)

unique ids that can change very frequently but stay the same if nothing changed (unique!)

(score: ∞)

• osm-id

unique references that won't changed (unique!)

(score: 6)

• wikidata
• iata
• icao
• ref:??? (not "ref", but: ref:whc, ref:isil, ref:dhis2, ref:vatin, ref:wmo, ref:wigos, ref:bag, ref:bufa, ...)
• fhrs:id (UK Food Hygiene Rating Scheme)

geo information that change seldom

(score: 5)

• Lng+Lat match up to the sixs decimal place
• full addr:??? match

urls that change rarely and are mostly unique (not neccessarly unique!)

(score: 4)

• wikipedia
• website
• facebook
• twitter
• phonenumber
• email
• contact:???

properties that can change but identify a place (not neccessarly unique!)

(score: 3)

• official_name
• long_name
• name
• short_name
• alt_name

vague properties that can eventually identify (not neccessarly unique!)

(score: 2)

• wikimedia_commons
• mapillary
• flickr
• url
• int_ref // international
• nat_ref // national
• reg_ref // regional
• loc_ref // local
• icn_ref // international cycle route
• ncn_ref // national cycle route
• rcn_ref // regional cycle route
• lcn_ref // local cycle route

properties that identify a group of places (not unique but can narrow it down in combination!)

(score: 1)

• ???:wikidata (operator:wikidata, network:wikidata, brand:wikidata, architect:wikidata, artist:wikidata, species:wikidata, subject:wikidata, name:etymology:wikidata, flag:wikidata, ...)
• operator
• network
• brand
• architect
• artist
• species
• subject
• name:etymology
• flag
• cycle_network

any other properties

• ???

Further reading:

https://wiki.openstreetmap.org/wiki/Permanent_ID https://wiki.openstreetmap.org/wiki/Category:World_wide_external_reference_tag https://wiki.openstreetmap.org/wiki/Key:iata https://wiki.openstreetmap.org/wiki/Key:wikidata https://wiki.openstreetmap.org/wiki/Key:ref