[Qgis-user] RES: Trouble with select by location between point and line layer

[João Henrique Carneiro]

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 <havard.tveite at nmbu.no> 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:jhcarneiro at axaeng.com]
>> *Enviada em:* sexta-feira, 25 de setembro de 2015 14:40
>> *Para:* 'qgis-user at lists.osgeo.org'
>> *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
>> 
>> 
>> 
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