In a segment it's quite dificult to intersect a point in line. Unless you have somekind of tolerance. I believe ArcGIS have an automatic tolerance set.
If you want to make sure that the points REALLY intersect the line, you need extra nodes on your line. I would use Postgis St_Snap for that. Em dom, 27 de set de 2015 às 22:02, João Henrique Carneiro < [email protected]> escreveu: > Hello Havard, > THanks for responding. > > I cannot have any error. My client will be checking for topological > errors. In ArcGIS these points are detected by “Select by Location” but not > be QGIS. > > Best regards, > João Carneiro > > On Sep 27, 2015, at 5:35 PM, Håvard Tveite <[email protected]> > wrote: > > > > A tolerance value would probably be needed in the general > > case. > > Have you tested with horizontal or vertical lines? > > > > Håvard Tveite > > > > On 25. sep. 2015 21:53, João Carneiro wrote: > >> Updating the information below – > >> > >> I have checked that select by location only selects the points that are > >> snapped to a vertice of a sg_line, but not snapped to segments. Is this > >> working as expected, or do we have a bug here? > >> > >> Att., > >> > >> João Carneiro > >> > >> *De:*João Carneiro [mailto:[email protected]] > >> *Enviada em:* sexta-feira, 25 de setembro de 2015 14:40 > >> *Para:* '[email protected]' > >> *Assunto:* Trouble with select by location between point and line layer > >> > >> Hello, > >> > >> Has anyone had the following problems? > >> > >> I am trying to detect topological problems in my data between two > >> classes called sg_point and sg_line. Our topological rule is that > >> sg_point MUST be snapped to sg_line. > >> > >> I imagine that the best way to do this is by using “Select By Location” > >> and select all points that intersect the line. Unfortunately this does > >> not work, and neither does trying the opposite selection. Trying to > >> select all the points that don’t intersect the line gives me 100% of the > >> points even if there were some points that were correctly snapped to the > >> line beforehand. > >> > >> I have not managed to select only the points that don’t intersect the > >> line or only the points that do intersect the line. > >> > >> What am I doing wrong? > >> > >> Thanks for any help. > >> > >> Best regards, > >> > >> João Carneiro > >> > >> > >> > >> _______________________________________________ > >> Qgis-user mailing list > >> [email protected] > >> http://lists.osgeo.org/mailman/listinfo/qgis-user > >> > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/qgis-user > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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