[Qgis-user] QGIS big fail in deleting Shapes!!
Matthias Kuhn
matthias at opengis.ch
Tue Jan 19 22:34:58 PST 2016
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
> <mailto: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
> <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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