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v4.5
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    v4.5

      point()

      La fonction point() assemble deux nombres représentant la latitude et la longitude en coordonnées géographiques de type point.

      Arguments:

      • objet de latitude & longitude <object>

      Renvoie:

      • coordonnées géographiques <point>

      Usage Commun

      Exemple : Convertir Pékin (39.9° N 116.3° E) en coordonnées géographiques

      return point({latitude:39.9, longitude:116.3})
      

      POINT(39.900000 116.300000)
      

      Exemple : Convertir chaque ligne d'un alias en coordonnées géographiques

      uncollect [{latitude:39.9, longitude:116.3},{latitude:31.2, longitude:121.5}] as a
      return point(a)
      

      POINT(39.900000 116.300000)
      POINT(31.200000 121.500000)
      

      Analyse : Le paramètre d'entrée de la fonction point() est un objet, non pas la latitude et la longitude sous forme décimale.

      Exemple de graph : (à utiliser pour les exemples suivants)

      Exécutez les UQLs ci-dessous un par un dans un graphset vide pour créer des données de graph :
      create().node_property(@default, "name").node_property(@default, "lat_long", point)
      insert().into(@default).nodes([{_id:"L001", _uuid:1, name:"New York", lat_long:point({latitude:40.7, longitude:-74.0})}, {_id:"L002", _uuid:2, name:"Paris", lat_long:point({latitude:48.5, longitude:2.2})}, {_id:"L003", _uuid:3, name:"Sydney", lat_long:point({latitude:-33.9, longitude:150.9})}, {_id:"L004", _uuid:4, name:"Beijing", lat_long:point({latitude:39.9, longitude:116.3})}])
      

      Exemple : Insérer le node Shanghai (31.2° N 121.5° E) dans @location

      insert().into(@default).nodes({name: "Shanghai", lat_long: point({latitude: 31.2, longitude: 121.5}), _id: "L005", _uuid: 5}) as n
      return n{*}
      

      |  _id  | _uuid |    name    |           lat_long          |
      |-------|-------|------------|-----------------------------|
      | L005  |   5   |  Shanghai  | POINT(31.200000 121.500000) |
      
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