Hi, Well I don't think so. Some of the inside polygons can have the same border as the most outer polygon with some of the vertices. Some of the polygons can be half inside and half outside, then I would like them both to be a most outer polygon and some polygons has no inside polygons at all = most outer polygon.
Kind regards, Paul -----Ursprungligt meddelande----- Från: postgis-users <[email protected]> För Jorge Gustavo Rocha Skickat: den 30 november 2021 12:44 Till: [email protected] Ämne: Re: [postgis-users] polygons inside polygon Klicka bara p l nkar och ppna bilagor om du litar p avs ndaren och vet att inneh llet r s kert. Hi Paul, Maybe you can try to apply a ST_ConvexHull. The resulting geometry ST_touches the most outer polygon. Can you try that or this not make sense? Regards, Jorge On 30/11/21 10:42, [email protected] wrote: > 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=E3f > bWP_UxOp_aLqY_yLoWpoHnd9en_osfYJj-MVUi5KueBYHM1BjtHCJY7dzm-LB011qRSove > VUqU8Wbo-SQYSOYr9IMVYP063lEVQCr3G9ErfMMDLx0JWLLcyDsdbz4OsKdCpzFuBZU-g6 > Zf2gdwauTuWm-WmCCd-yXe9BTojKOCWOHXliBKmmUzJm2IMYt21G3fa06qgsJNMVB57og9 > hfef8SNtdDMCfyM41WFZcL6sAWT7ulje7X4_yE-ywIBR2t6-OHWw7iVq5THHQ_FPz6JAbb > D-P0i4FQ6Ze6X30U>) > below is my take on this: > > select distinct on (t1.id > <https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=9KJ > uH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmC > MWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J > _a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1Vj > fK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>) > t1.id > <https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=9KJ > uH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmC > MWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J > _a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1Vj > fK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>,t2.id > <https://url11b.mailanyone.net/v1/?m=1mrxkX-0008NY-3a&i=57e1b682&c=MB1 > btGDh1LRWWz9_qH-7fMRyiv5SylMmhNclzuXCnly7_WjBFSzNNi8uoxskAeJ4w4vgf__ot > NnIlUBwzIcTXhXbUpsTFsuilzyfmYd9zwlz05eB_sxpFqejtXwlOFEeYlEQLMRezJUhez4 > -Az3YSqWptDxKMQo3xICyLgQ_J7X-Y60pOXOjXiF2bxqaDL7qbXenH7LOd0rsTK8ovDtTM > 0OQ4EBcMuXDxIvRB7k1Wb5YS5ejXpy-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=9KJ > uH3f7Mex6ks3lu5cPQvny5O6XFhyh-eH6svguvEFAWIQVxt2r_IF0pHeMBwTmQ0XE2xxmC > MWnaDbfaMp5XAI5b_Dcd0CClUb5RGp_7jG34xScneDpX0vYGQ4vngdzDwWvGm-5Vrd9D1J > _a38Rof5Lup9vwpMo_mGHYNGYu4f1wTbn36eA3P8CNM6_0ioVin4dzKvW5LcIMv9Lun1Vj > fK4qpwRVaVWuelYCEa3WiGmNGu1zEEv9fA7t7zcNFT0>,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=_ux > AORlsjsjbGN7PYxaRnlHKfS3HxcXJKlgGb8oZkkQQ7KeYaBvj63dVA9iAwHJFsiNVtticr > WS07KEdiJM7B5FK1Yaq43by7MzodRIkmRm9i5TYx5AMTzK7gTO_Qito-2qIlo3A7Ie0mip > OiHVt2vWc3OvcW4JCOK1neLV9mQTj4o8JyaGnGIG3M_sLpXMopSV6-fN3Qc5DR2cPPfCZ4 > ySDLNEacKWQP5buUcMtkzhGviuZh24fRX4mSjaR9t7d9eZEeB6bPE0YFX2AgKUEY2w9g5s > 3z41MQ6FNL6ZvrJU> > > > _______________________________________________ > postgis-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/postgis-users > J. Gustavo -- Jorge Gustavo Rocha Departamento de Informática Universidade do Minho 4710-057 Braga Gabinete 3.29 (Piso 3) Tel: +351 253604480 Fax: +351 253604471 Móvel: +351 910333888 skype: nabocudnosor _______________________________________________ postgis-users mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/postgis-users
