Dear Randy
unfortunately the dimensions of the smaller polygons are very variable and it's hard to apply your method. I'm gonna try with GRASS or OTB or SAGA. I will keep you in touch. Thank you very much Giacomo On Sun, Apr 19, 2015 at 6:54 PM, Randal Hale < [email protected]> wrote: > I believe you can do it this way (as I'm experimenting with this very > thing). Of course - if you have very small polygons with even smaller > polygons this wouldn't work. > > Select features using an expression and let your expression be $area < > square units you are looking for. > > I wanted to select everything in my layer less than 10 acres (I am working > in Feet) so I entered $area < 435600 and have quite a few polygons selected > now. I am checking to make sure it has done what I wanted. > > Hope this helps - I'm pretty sure there is a more elegant solution than > $area - but so far this works for me. > > Randy > > > On 04/19/2015 12:38 PM, Giacomo Fontanelli wrote: > > Hello forum > > this post is similar to my last one, but not totally the same. > > Thank you for making me know the Sieve filter. > > I have a vector layer. > > I have some polygons that apparently seem to be lying on bigger polygons > and totally included on this, but if you delete the small ones they produce > holes on the big polygons with the same dimension and shape of the small > polygons. > Well: this is the result I'd like to obtain, I mean I would like to > automatically delete the smaller polygons producing the described holes. > > How can I do this? > > Thank you very much > > > _______________________________________________ > Qgis-user mailing > [email protected]http://lists.osgeo.org/mailman/listinfo/qgis-user > > > -- > ----------------- > Randal Hale > North River Geographic Systems, > Inchttp://www.northrivergeographic.com423.653.3611 > [email protected] > twitter:rjhale > http://about.me/rjhalehttp://www.northrivergeographic.com/introduction-to-quantum-gis > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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