[Qgis-developer] Problem when using spatial index

[Nejia Ben Nasr]

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,

Nejia

De : Junior [mailto:delazj at gmail.com] 
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" <nejia.bennasr at spaceyes3d.com>
Pour : "'Junior'" <delazj at gmail.com>
Cc : "'qgis-developer'" <qgis-developer at lists.osgeo.org>
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:delazj at gmail.com] 
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" <nejia.bennasr at spaceyes3d.com>
Pour : "'Junior Delaz'" <delazj at gmail.com>
Cc : "'qgis-developer'" <qgis-developer at lists.osgeo.org>
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:delazj at gmail.com] 
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 <nejia.bennasr at spaceyes3d.com>:

Hi,

 

Do you think that this problem is often caused by geometry problems?

 

Thanks,

Nejia

 

De : Junior [mailto:delazj at gmail.com] 
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" < <mailto:nejia.bennasr at spaceyes3d.com> nejia.bennasr at spaceyes3d.com>
Pour : "'qgis-developer'" < <mailto:qgis-developer at lists.osgeo.org> qgis-developer at lists.osgeo.org>
Objet : [Qgis-developer] Problem when using spatial index
Date : mar., janv. 20, 2015 13:03

 

I use QGIS 2.6.1

 

De : qgis-developer-bounces at lists.osgeo.org [mailto:qgis-developer-bounces at lists.osgeo.org] 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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