Pierre,

 

this is now the third message in this list concerning fatal errors in editing 
shapefiles in QGIS within a few weeks (see details below). Maybe it’s not a 
consolation to you, but others lost a lot of confidence in QGIS, too. Looks 
like there are bugs that are very difficult to remove. It’s a pity that there 
is no information on the debugging status.

 

Regards,

 

Uwe 

 

On Feb 2, 2016 8:46 PM, "Springfield Harrison [via OSGeo.org] " <[hidden email] 
<http://user/SendEmail.jtp?type=node&node=5248593&i=0> > wrote:

Hello Group,

        Am using QGIS 2.10.1 and have done so without significant problems for 
many months.  I am attempting to create simple polygons in a shapefile by 
direct vertex entry or copying polygons from another shapefile layer and 
pasting them into the active layer.

        In almost every case, these features disappear.  There is an entity 
entry in the attribute table but there are no polygons created.  In one case a 
polygon was created but it was not the shape that I digitized; no more polygons 
could be created although the process for doing so appears to be working.  No 
error messages were created.  The CRS for the project and the shapefile are the 
same.

        The shapefile can be opened in another GIS but has no content.
        
        Here are some product details:  QGIS version  2.10.1-Pisa  QGIS code 
revision  d20c5b7 <https://github.com/qgis/QGIS/commit/d20c5b7> 

        Thanks very much for any help you can render, Cheers . . . . . . . . 
Springfield Harrison

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Hello all,

 

today I was working on a shape dataset and I had to delete some features. Later 
I opened the shapefile in ArcMap by chance and I found that the features were 
not deleted. They still did exist. I repeated the process – and got the same 
result. Then, searching the internet, I found this incredible post: 
https://hub.qgis.org/issues/11007

 

It is a well known problem (for 1,5 years!!) that QGIS is not able to delete 
shapes in a reliable way!! I was horrified to read this because it is the same 
as if a Word processor would not be able to delete a letter from a text. I 
cannot understand why the QGIS developers haven’t fix that yet. If QGIS really 
wants to compete with ArcMap, they should fix it as soon as possible. At least, 
the according menu entries or buttons should be inactivated if they don’t bring 
out reliable results.

 

My questions are:

*         is this information still up to date? I can‘t read all of the 80 
answers to the post now to get in-depth information ...

*         does anybody have information about how they are planning to handle 
this problem at the development team?

*         is there a workaround for this? Do the GRASS vector tools bring out 
reliable results?

*         are there more of those software errors in QGIS that might lead to 
huge problems in working on vector data and sharing them with others? If so, is 
there a „black list“ of things one is never allowed to use in QGIS if you don’t 
want to destroy your datasets?

 

 

 

 

 

 

 

 

Von: Qgis-user [mailto:[email protected]] Im Auftrag von Pierre 
Muckensturm
Gesendet: Montag, 8. Februar 2016 14:34
An: [email protected]
Betreff: [Qgis-user] [QGis 2.10]Error while saving shape file

 

Hi,

I use a QGis 2.10 version,  X64 on Windows installed with Osgeo4W.

I'll try to explain the bug. 

I work on a map, with a shape file of polygons. They are not really complex, 
nor numerous (25). I got   id,    DOSSIER,    NOM_OPERAT,    PRIORITE,    
COMMENTA,    DATE_MAJ,    SOURCE,    LIBELLE_X, LIBELLE_Y fields and         
SURF_HA which is a virtual field.

Friday, it took me 5 min to save the file each time I modify a vertex.

 

Today, I update my id field with the expression "$id". Then, my shape file 
looks like a totally mess (look at the imgur album : http://imgur.com/a/noSM2). 
The LIBELLE_X, LIBELLE_Y fields have disappeard, the DOSSIER field which used 
to be null is now partially fulled, the NOM_OPERAT are truncated, fulled in a 
completelly non-sense manner. As for PRIORITE, DATE_MAJ. 

Conclusion, 2 days of work in a trash. I'm quite pissed off, according with the 
fact that I'm trying to convince my superior we shall use QGis.

So, what happened ? How could this happen ? Sorry but I don't have the genuine 
files, and the data are quite sensitive.



-- 

PLM

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