Re: [Qgis-user] Topological editing of two vector layers
Hello Deon, If you have the chance, exporting both your layers to Postgres\Postgis, would allow you to, for each district geometry, run ST_Snap[1] against its related province geometry. With the correct tolerance, this might solve a big part of your Boundary differences. Even tho, you would need to check the result and correct the rest of the problems manually. Best regards, Alexandre Neto [1] http://postgis.org/docs/ST_Snap.html On Mon, Oct 21, 2013 at 8:10 AM, Harish wrote: > If the layers are digitized by different agencies and dissolving is time > consuming for each next higher level, then the automatic snapping of > boundaries within tolerance distance, with keeping one layer as correct > layer will be a useful feature. > Regards > > > > On Tue, Oct 15, 2013 at 7:25 PM, Carlos Cerdán wrote: > >> ... or you can disolve your districts to obtain new provinces and leave >> the old layer >> >> Good luck >> >> Carlos Cerdán >> >> >> 2013/10/15 Lene Fischer >> >>> Hello Deon >>> You can use the function Avoid Intersection while digitizing. >>> In this way you avoid overlap - but not gaps. >>> Read more about this issue in the usermanual >>> >>> >>> http://qgis.org/en/docs/gentle_gis_introduction/06_topology.html?highlight=snap >>> >>> http://qgis.org/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html?highlight=snap >>> >>> Regards >>> Lene Fischer >>> >>> -- >>> *Fra:* qgis-user-boun...@lists.osgeo.org [ >>> qgis-user-boun...@lists.osgeo.org] på vegne af Pretorius Deon - >>> Lieutenant Colonel [pretoriusd...@saps.gov.za] >>> *Sendt:* 15. oktober 2013 06:55 >>> *Til:* 'qgis-user@lists.osgeo.org' >>> *Emne:* [Qgis-user] Topological editing of two vector layers >>> >>> Hi, Iam new to QGIS. I have two boundary vector layers, the one >>> exist of polygons of all the provinces and the other of all the districts. >>> The district boundaries must be aligned with the provincial boundaries. >>> Since there is so much errors that needs alignment and rectification I was >>> wondering if there isn’t an easier way as to snap to the boundaries without >>> to drag each vertex which is very time consuming. Is there perhaps a way >>> where the whole identified segments/vertex of the districts can be aligned >>> easier to the provincial boundaries. >>> >>> >>> >>> Regards >>> >>> >>> >>> Deon Pretorius >>> >>> >>> >>> >>> > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Topological editing of two vector layers
If the layers are digitized by different agencies and dissolving is time consuming for each next higher level, then the automatic snapping of boundaries within tolerance distance, with keeping one layer as correct layer will be a useful feature. Regards On Tue, Oct 15, 2013 at 7:25 PM, Carlos Cerdán wrote: > ... or you can disolve your districts to obtain new provinces and leave > the old layer > > Good luck > > Carlos Cerdán > > > 2013/10/15 Lene Fischer > >> Hello Deon >> You can use the function Avoid Intersection while digitizing. >> In this way you avoid overlap - but not gaps. >> Read more about this issue in the usermanual >> >> >> http://qgis.org/en/docs/gentle_gis_introduction/06_topology.html?highlight=snap >> >> http://qgis.org/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html?highlight=snap >> >> Regards >> Lene Fischer >> >> -- >> *Fra:* qgis-user-boun...@lists.osgeo.org [ >> qgis-user-boun...@lists.osgeo.org] på vegne af Pretorius Deon - >> Lieutenant Colonel [pretoriusd...@saps.gov.za] >> *Sendt:* 15. oktober 2013 06:55 >> *Til:* 'qgis-user@lists.osgeo.org' >> *Emne:* [Qgis-user] Topological editing of two vector layers >> >> Hi, Iam new to QGIS. I have two boundary vector layers, the one exist >> of polygons of all the provinces and the other of all the districts. The >> district boundaries must be aligned with the provincial boundaries. Since >> there is so much errors that needs alignment and rectification I was >> wondering if there isn’t an easier way as to snap to the boundaries without >> to drag each vertex which is very time consuming. Is there perhaps a way >> where the whole identified segments/vertex of the districts can be aligned >> easier to the provincial boundaries. >> >> >> >> Regards >> >> >> >> Deon Pretorius >> >> >> >> >> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Topological editing of two vector layers
... or you can disolve your districts to obtain new provinces and leave the old layer Good luck Carlos Cerdán 2013/10/15 Lene Fischer > Hello Deon > You can use the function Avoid Intersection while digitizing. > In this way you avoid overlap - but not gaps. > Read more about this issue in the usermanual > > > http://qgis.org/en/docs/gentle_gis_introduction/06_topology.html?highlight=snap > > http://qgis.org/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html?highlight=snap > > Regards > Lene Fischer > > -- > *Fra:* qgis-user-boun...@lists.osgeo.org [ > qgis-user-boun...@lists.osgeo.org] på vegne af Pretorius Deon - > Lieutenant Colonel [pretoriusd...@saps.gov.za] > *Sendt:* 15. oktober 2013 06:55 > *Til:* 'qgis-user@lists.osgeo.org' > *Emne:* [Qgis-user] Topological editing of two vector layers > > Hi, Iam new to QGIS. I have two boundary vector layers, the one exist > of polygons of all the provinces and the other of all the districts. The > district boundaries must be aligned with the provincial boundaries. Since > there is so much errors that needs alignment and rectification I was > wondering if there isn’t an easier way as to snap to the boundaries without > to drag each vertex which is very time consuming. Is there perhaps a way > where the whole identified segments/vertex of the districts can be aligned > easier to the provincial boundaries. > > > > Regards > > > > Deon Pretorius > > > > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
