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     drop table  if exists uga2010.wso;
     CREATE TABLE uga2010.wso (
     id serial PRIMARY KEY,
     wso_id integer,
     uga varchar(25)
     )

--Loire
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='1') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Loire' where uga IS NULL --40 sea nodes

--Garonne
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='2') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Garonne' where uga IS NULL --60 sea nodes

--Adour
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='3') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Adour' where uga IS NULL --19 sea nodes

--Artois-Picardie
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='4') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='ArtoisPicardie' where uga IS NULL --26 sea nodes

--Rhône-M‚diterranée
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='5') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='RhoneMediterranee' where uga IS NULL --133 sea nodes

--Corse
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='6') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Corse' where uga IS NULL --177 sea nodes

--Seine-Normandie
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='7') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='SeineNormandie' where uga IS NULL --89 sea nodes

--Bretagne
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='8') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Bretagne' where uga IS NULL --166 sea nodes

--Rhin
    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='9') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Rhin' where uga IS NULL --2 sea nodes

--Meuse

    insert into uga2010.wso(wso_id) 
    select distinct on (wso_id)  wso_id from ccm21.riversegments r
    join (SELECT ST_Union(f.the_geom) as singlegeom
        FROM uga2010.uga As f where gid='10') as sub
    ON ST_Intersects(sub.singlegeom,r.the_geom);

    UPDATE uga2010.wso set uga='Meuse' where uga IS NULL --3 sea nodes

J'ai un doute pour la requête entre wso_id et wso1_id lequel choisir ??

Problème dans la construction même des UGA
Deux couches d'UGA (Loire et Garonne) se supperpose QGis au niveau de la mer

Mais sous ArcGis il ne semble pas y avoir de suppersposition

Probleme de segment à cheval sur deux couches

Recherche de doublons

select wso_id, count(wso_id) as nombre from uga2010.wso group by wso_id order by nombre;

Problèmes de doubons avec les riversegments qui sont à cheval sur deux UGA

wso_id	nb de doublons	UGA donnés	Appartient en réalité à l'UGA (ce que je propose)
291110	3	Rhin, Meuse, RhoneMediterranee
291111	4	SeineNormandie, Loire, Garonne et Bretagne	Loire
291112	2	RhonemEditerranee, Rhin
291115	3	ArtoisPicardie, SeineNormandie, Meuse
291125	2	Loire, Garonne	Garonne
291126	2	Garonne, RhoneMediterranee	Garonne
291130	3	ArtoisPicardie, Meuse, SeineNormandie
291194	2	Garonne, Adour
291223	2	ArtoisPicardie, SeineNormandie
291249	2	SeineNormandie, Loire
291513	2	Garonne, RhoneMediterranee	RhoneMediterranee?
292706	2	Garonne, RhoneMediterranee	Garonne
309731	2	Loire, Garonne	Garonne
442353	2	Garonne, RhoneMediterranee	Aucune idée !||