Thank you Marcin! I’m not sure if I understand you correct. Here is what I tried to do to get the outer most polygons:
Select * from "org" Where "fid" IN( select distinct on (t1.fid) t1.fid from "org" t1,"org" t2 where ST_Area(t1.the_geom)>ST_Area(t2.the_geom) and ST_intersects(t1.the_geom,t2.the_geom) order by t1.fid,ST_Area(t2.the_geom) desc) AND "fid" NOT IN ( select distinct on (t1.fid) t2.fid from "org" t1,"org" t2 where ST_Area(t1.the_geom)>ST_Area(t2.the_geom) and ST_Intersects(t1.the_geom,t2.the_geom) order by t1.fid,ST_Area(t2.the_geom) desc); I’m still getting polygons inside other polygons. Kind regards, Paul Från: postgis-users <[email protected]> För Marcin Mionskowski Skickat: den 30 november 2021 08:40 Till: PostGIS Users Discussion <[email protected]> Ämne: Re: [postgis-users] polygons inside polygon Klicka bara på länkar och öppna bilagor om du litar på avsändaren och vet att innehållet är säkert. Assuming (1) your problem is not trivial (you have more then one "outer most" polygon) and (2) there can be only one type of spatial relationship (polygons are properly contained https://postgis.net/docs/ST_ContainsProperly.html<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=E3fbWP_UxOp_aLqY_yLoWpoHnd9en_osfYJj-MVUi5KueBYHM1BjtHCJY7dzm-LB011qRSoveVUqU8Wbo-SQYSOYr9IMVYP063lEVQCr3G9ErfMMDLx0JWLLcyDsdbz4OsKdCpzFuBZU-g6Zf2gdwauTuWm-WmCCd-yXe9BTojKOCWOHXliBKmmUzJm2IMYt21G3fa06qgsJNMVB57og9hfef8SNtdDMCfyM41WFZcL6sAWT7ulje7X4_yE-ywIBR2t6-OHWw7iVq5THHQ_FPz6JAbbD-P0i4FQ6Ze6X30U>) below is my take on this: select distinct on (t1.id<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=9KJuH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmCMWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J_a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1VjfK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>) t1.id<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=9KJuH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmCMWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J_a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1VjfK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>,t2.id<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=MB1btGDh1LRWWz9_qH-7fMRyiv5SylMmhNclzuXCnly7_WjBFSzNNi8uoxskAeJ4w4vgf__otNnIlUBwzIcTXhXbUpsTFsuilzyfmYd9zwlz05eB_sxpFqejtXwlOFEeYlEQLMRezJUhez4-Az3YSqWptDxKMQo3xICyLgQ_J7X-Y60pOXOjXiF2bxqaDL7qbXenH7LOd0rsTK8ovDtTM0OQ4EBcMuXDxIvRB7k1Wb5YS5ejXpy-7iOFHBuUUIEB> from t t1,t t2 where ST_Area(t1.geom)>ST_Area(t2.geom) and ST_Intersects(t1.geom,t2.geom) order by t1.id<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=9KJuH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmCMWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J_a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1VjfK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>,ST_Area(t2.geom) desc; Enclose this in CTE and then just select "outer" polygons based on left column and "inner" based on right column. wt., 30 lis 2021 o 07:30 <[email protected]<mailto:[email protected]>> napisał(a): Hi, I have a polygon layer where polygons are inside other polygons (could be polygons in polygons in polygons…). I would like to separate them in 2 different layers, one layer with the outer most polygon and one layer with all polygons that has a surrounding polygon. Is there a smart way to do this in SQL? Thanks, Paul [1_LFV_svensk_96] Paul Malm Operations / AIM Flyginfo SE Direkt 08-797 70 23 Mobil 070-860 11 15 [email protected]<mailto:[email protected]> Besöks- och postadress LFV Flyginfo SE Af Pontins väg 6 115 21 STOCKHOLM Tänk på miljön innan du skriver ut detta e-postmeddelande. _______________________________________________ postgis-users mailing list [email protected]<mailto:[email protected]> https://lists.osgeo.org/mailman/listinfo/postgis-users<https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=_uxAORlsjsjbGN7PYxaRnlHKfS3HxcXJKlgGb8oZkkQQ7KeYaBvj63dVA9iAwHJFsiNVtticrWS07KEdiJM7B5FK1Yaq43by7MzodRIkmRm9i5TYx5AMTzK7gTO_Qito-2qIlo3A7Ie0mipOiHVt2vWc3OvcW4JCOK1neLV9mQTj4o8JyaGnGIG3M_sLpXMopSV6-fN3Qc5DR2cPPfCZ4ySDLNEacKWQP5buUcMtkzhGviuZh24fRX4mSjaR9t7d9eZEeB6bPE0YFX2AgKUEY2w9g5s3z41MQ6FNL6ZvrJU>
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