User talk:jleedev

Wikidata and FAA airportsBouzinac (talk) 06:45, 14 July 2019 (UTC)[edit]

Hello, thanks for your contribution on Waltman Airport (Q49751725) If you are interested and if you have time, could you help me find the duplicates or holes, and correct them ? --Bouzinac (talk) 06:45, 14 July 2019 (UTC)[reply]

PREFIX wdno: <http://www.wikidata.org/prop/novalue/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

SELECT DISTINCT ?locLabel ?airport ?airportLabel ?coord ?long ?lat ?ICAO ?IATA ?Local_Code ?dist
{
  {
  SELECT DISTINCT ?loc ?airport (SAMPLE(?_coord) AS ?coord) (SAMPLE(?_long) AS ?long) (SAMPLE(?_lat) AS ?lat) ?ICAO ?IATA (SAMPLE(?Local_Code) AS ?Local_Code)
  {
    ?airport wdt:P31/(wdt:P279*) wd:Q62447;
      wdt:P17 wd:Q30.
    MINUS { ?airport wdt:P576 _:b2. }
    MINUS { ?airport wdt:P582 _:b3. }
    MINUS { ?airport wdt:P31/(wdt:P279*) wd:Q1311670. }
    MINUS { ?airport wdt:P31/(wdt:P279*) wd:Q7373622. }
    MINUS { ?airport wdt:P31/(wdt:P279*) wd:Q2265915. }
    MINUS { ?airport wdt:P31/(wdt:P279*) wd:Q44665966. }
    MINUS { ?airport wdt:P31/(wdt:P279*) wd:Q782667. }
    MINUS { ?airport rdf:type wdno:P17. }
    OPTIONAL {
      ?airport p:P625 [
        a wikibase:BestRank; ps:P625 ?_coord;
        psv:P625 [ wikibase:geoLongitude ?_long; wikibase:geoLatitude ?_lat ]
      ] .
    } .
    OPTIONAL { ?airport wdt:P239 ?ICAO. }
    OPTIONAL { ?airport wdt:P238 ?IATA. }
    OPTIONAL { ?airport wdt:P240 ?Local_Code. }
    OPTIONAL {
      ?airport wdt:P131* ?loc.
      ?loc wdt:P31 ?type.
      ?type (wdt:P279*) wd:Q35657.
    } .
  } GROUP BY ?loc ?airport ?ICAO ?IATA
  } .
  wd:Q934 wdt:P625 ?pole .
  BIND( geof:distance( ?pole, ?coord ) AS ?dist ) .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en,fr,[AUTO_LANGUAGE]". }
}
ORDER BY ?dist ?long ?lat

Click here to launch the Wikidata query

Bouzinac (talk) 06:45, 14 July 2019 (UTC)[reply]

Sounds thrilling. When I view those results in QGIS and set it to "point cluster", some duplicates immediately pop into view, but is there a more systematic approach? jleedev (talk) 14:10, 14 July 2019 (UTC)[reply]

To answer my own question, this query appears to use "distance from north pole" as a proxy for clustering nearby locations together. jleedev (talk) 18:15, 15 July 2019 (UTC)[reply]

Hello jleedev, you got the point. You could also sort by name and check the possible duplicates but it's a very lenghty process as there would be 21.000 elements to check... Typically, if an element share name but X has a FAA code and Y not, then there is high chances of duplicates

And sometimes, it might appear that the airport/aérodrome no longer exists. Then I would put a dissolved, abolished or demolished date (P576) = unknown value [which helps tell it's a closed airport, and helps filter closed airports]--Bouzinac (talk) 04:51, 16 July 2019 (UTC)[reply]

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