[Qgis-user] QGIS big fail in deleting Shapes!!

[Luigi Pirelli]

As you can read in the link posted my Mathias, everyone can have a
simple but really important workaround. Abandon shapefile definitively
or use it only as interchange format.

Luigi Pirelli

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On 20 January 2016 at 07:34, Matthias Kuhn <matthias at opengis.ch> wrote:
> Hi all,
>
> Here is some more eplanation of the issue:
>
> http://gis.stackexchange.com/questions/58101/how-to-avoid-creating-corrupt-shapefiles-during-editing/79677#79677
>
> I spent quite some time to fix this issue as much as possible from QGIS side
> (Hint: "they" are not just lazy and ignore problems ;-) )
> It seems that there is also a second (closely related) problem left to be
> solved and it looks that it can be solved by shipping a newer GDAL version.
> Apparently the issue has not been completely solved yet and apparently it is
> considered to be from "critical" over "big fail" to "fatal" from the
> audience.
> It would be awesome if you could ask the maintainer of your operation
> system's builds for a quote to ship QGIS with GDAL 2.0 on your operation
> system. We will gladly provide you with email addresses.
>
> Best regards,
> Matthias
>
>
> On 01/19/2016 10:54 PM, Mats Elfström wrote:
>
> Hi!
> While all that Nicolas and Uwe says is generally true and reasonable, it is
> also true that bugs and errors can be more or less dangerous.
> With limited resources, it is even more important that bugs are handled
> according to a simple risk analysis.
> In this case, it would go something like this:
> What is the probability that users will edit shape files (high, moderate,
> low): High
> What is the probability that QGIS will damage shape files: Moderate (as I
> understand)
> What is the severity of the potential damage (fatal, reparable, negligible):
> Fatal
> And High * Moderate * Fatal equals a probable risk for fatal damage, which
> ought to prompt for a rapid fix of ths bug, regardless of where it resides
> in the QGIS ecosystem.
> But oddly enough, I have browsed through many of the posts on the shape file
> issue, but have yet to find a technical description of the exact cause and
> origin of this bug.
>
> Regards, Mats.E
>
>
> 2016-01-19 22:14 GMT+01:00 Saber Razmjooei
> <saber.razmjooei at lutraconsulting.co.uk>:
>>
>> Dear Uwe,
>>
>>
>>
>> There are some work-arounds and solutions provided within the ticket.
>>
>>
>>
>> Also, work is underway to resolve the issue in the next LTR release. Last
>> time I checked (5 minutes ago) it is still present in master.
>>
>>
>>
>> I totally agree with you that there should be a warning to users to make
>> them aware of this limitation.
>>
>>
>>
>> In general, QGIS and other GIS/non-GIS proprietary software come with
>> bugs. The reason developers haven’t fixed this bug and other bugs is due to
>> lack of resources (time, money).
>>
>>
>>
>> The project steering committee is committed to resolving the bugs and they
>> have already allocated a big proportion of their income for bug fixing. You
>> can see last year’s financial report hear:
>>
>> http://qgis.org/en/_downloads/PublicQGISfinancialreport2014.pdf
>>
>>
>>
>>
>>
>> If you think, there should be more work done to increase the quality of
>> QGIS, you can get involved or contribute to the project:
>>
>>
>> http://qgis.org/en/site/getinvolved/governance/sponsorship/sponsorship.html
>>
>>
>>
>> Regards,
>>
>> Saber
>>
>>
>>
>> From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of
>> Uwe Fischer
>> Sent: 19 January 2016 19:10
>> To: 'qgis-user ML'
>> Subject: [Qgis-user] QGIS big fail in deleting Shapes!!
>>
>>
>>
>> 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?
>>
>>
>>
>>
>>
>> Regards,
>>
>> Uwe Fischer
>>
>>
>>
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>
> --
> ______________________________________________
> Mats Elfström, Väpplingvägen 21, SE-227 38 LUND, Sweden
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> --
> Matthias Kuhn
> OPENGIS.ch - https://www.opengis.ch
> Spatial • (Q)GIS • PostGIS • Open Source
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