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Some dams must be reproject and the gid (or wso1_id) must be changed:

DROP table if exists geobs2010.roe_ccm_500_final_gid;
CREATE TABLE geobs2010.roe_ccm_500_final_gid as (
select distinct on (ref_id) * from geobs2010.roe_ccm_500_final
);
update geobs2010.roe_ccm_500_final_gid SET gid=' ' where ref_id='';

#Problème de doublons

select gid, id_trhyd, dist_source_bdcar, dist_sea_bdcar, height, distproj_bdcar, nbdams, distproj_ccm, count(dist_source_bdcar) as Doublons from geobs2010.roe_ccm_500_final group by dist_source_bdcar, gid, id_trhyd, dist_sea_bdcar, height, distproj_bdcar, nbdams, distproj_ccm order by doublons

A vérifier : gid=298703, 293773, 266956, 272629

select * from geobs2010.roe_ccm_500_final where gid='298703'