Hi,
Then fix the layer with duplicate nodes. As stated here [1], it can be done
with the tool in vector menu > Geometry tools > Simplify geometry (setting the
tolerance to 0)
[1] http://docs.qgis.org/2.2/en/docs/user_manual/plugins/plugins_ftools.html
Envoyé depuis mon HTC
----- Reply message -----
De : "Nejia Ben Nasr" <[email protected]>
Pour : "'Junior Delaz'" <[email protected]>
Objet : [Qgis-developer] Problem when using spatial index
Date : mer., janv. 21, 2015 16:11
To inderstant the source of problem, if it’s caused by invalid geometry I do
this:- I load only a shapefile containing geometry with duplicate
nodes and I remove file .qix, here the problem appear: the spatial index is
atomically created and I can’t see all feature when I zoom or navigate in the
map. - I have another shapefile containing some rows without geometry,
I load only it in Qgis and I create a spatial index, here there is no problem
De : Junior Delaz [mailto:[email protected]]
Envoyé : mercredi 21 janvier 2015 14:57
À : Nejia Ben Nasr
Objet : Re: [Qgis-developer] Problem when using spatial index I assume
duplicate nodes invalidate geometry but I don't think such thing can create the
current bug. OGR/GEOS guru?
But if I understand your second sentence, you have a shapefile containing some
rows without geometry. Right? So, what do u mean by "I don't have a problem
with this file"? Is it another file or the file on which you're creating the
spatial index?
You should :
- open a new project and add only the problematic file
- or delete from your current project the file with empty geometry (if it's not
the one you're creating spatial index on)
to see how it reacts when zooming in/out ...
2015-01-21 14:26 GMT+01:00 Nejia Ben Nasr <[email protected]>:The
problem appears with vector layers that contain geometries that containing
duplicate node(s), it’s considered as an invalid geometry ?When I select all
features from the bounding box of the vector layer, lines of features that has
a null geometry are not selected in the attribute table (I don’t have a problem
with this shapefile). Thanks,NejiaDe : Junior [mailto:[email protected]]
Envoyé : mercredi 21 janvier 2015 13:47
À : Nejia Ben Nasr
Cc : 'qgis-developer'
Objet : Re : [Qgis-developer] Problem when using spatial index
weird, it worked for others.
And if you spatially select all your features, are all the lines in the
attribute table being selected?
You haven't answered about checking geometry validity...
Envoyé depuis mon HTC
----- Reply message -----
De : "Nejia Ben Nasr" <[email protected]>
Pour : "'Junior'" <[email protected]>
Cc : "'qgis-developer'" <[email protected]>
Objet : [Qgis-developer] Problem when using spatial index
Date : mer., janv. 21, 2015 13:30
Yes, even if I delete the .qix before saving !! Thanks,Nejia De : Junior
[mailto:[email protected]]
Envoyé : mercredi 21 janvier 2015 13:23
À : Nejia Ben Nasr
Cc : 'qgis-developer'
Objet : Re : [Qgis-developer] Problem when using spatial index
And if you delete the .qix before saving? And then recreate it...
Envoyé depuis mon HTC
----- Reply message -----
De : "Nejia Ben Nasr" <[email protected]>
Pour : "'Junior Delaz'" <[email protected]>
Cc : "'qgis-developer'" <[email protected]>
Objet : [Qgis-developer] Problem when using spatial index
Date : mer., janv. 21, 2015 13:14
I already tried to save to anther shapefile and edit it (add, modify, remove
features …) the .qix was automatically created and I get the same problem
Thanks,Nejia De : Junior Delaz [mailto:[email protected]]
Envoyé : mercredi 21 janvier 2015 12:21
À : Nejia Ben Nasr
Cc : qgis-developer
Objet : Re: [Qgis-developer] Problem when using spatial index Some users [1]
have already encountered this issue and i understood that it may be related to
non correspondance between the number of rows in the .dbf file and number of
geometry (some rows had no geometry). A simple "Save As.." to another shapefile
has solved the problem.
[1] http://georezo.net/forum/viewtopic.php?id=95143 (in french, sorry )
2015-01-21 9:16 GMT+01:00 Nejia Ben Nasr <[email protected]>:Hi, Do
you think that this problem is often caused by geometry problems? Thanks,Nejia
De : Junior [mailto:[email protected]]
Envoyé : mardi 20 janvier 2015 13:41
À : Nejia Ben Nasr; 'qgis-developer'
Objet : Re : [Qgis-developer] Problem when using spatial index
Hi,
Nejia, what about the validity of the geometry of your features? You can check
with the tool in Vector menu > Geometry tools > check geometry validity
Envoyé depuis mon HTC
----- Reply message -----
De : "Nejia Ben Nasr" <[email protected]>
Pour : "'qgis-developer'" <[email protected]>
Objet : [Qgis-developer] Problem when using spatial index
Date : mar., janv. 20, 2015 13:03
I use QGIS 2.6.1 De : [email protected]
[mailto:[email protected]] De la part de Nejia Ben Nasr
Envoyé : mardi 20 janvier 2015 09:39
À : qgis-developer
Objet : [Qgis-developer] Problem when using spatial index
Hi all, I load a shapefile, then I create a spatial index to maximize speed of
zoom and navigate in the map.The problem is: when I zoom to any area feature
appear and other doesn’t.And it seems To me that the spatial index is
automatically created even when I delete the .qix file Best regards,Nejia
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