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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