[Qgis-user] After deleting points, attribute rows persist
Bernhard Ströbl
bernhard.stroebl at jena.de
Mon Jan 7 22:53:06 PST 2019
Hi Saber,
Delete a single point (part) in a multi-point layer with remove part
tool (as you would with e.g. a multi-polygon layer).
Move single point in a multi-point layer: There is no option to move a
part in a multi-line or multi-polygon layer either (or I am not aware of
it). Why is it different for multi-point? If there is a need to move
parts in a multi-* layer, a dedicated tool should be established IMHO
covering all cases.
Do not misunderstand me, I really do not bother but I started thinking
about the tool's behaviour for point layers during this thread and IMHO
the behaviour is not consistent:
1) the tool is called _node_ but it works on _points_, too
2) It can be used to move/delete single point geometries or parts of
multi-points, but it cannot be used to move parts when editing lines or
polygons (neither single nor multi), furthermore for deleting parts
there is another tool that does exactly the same.
Bernhard
Am 07.01.2019 um 16:59 schrieb Saber Razmjooei:
> Hi Bernhard,
>
> How about multi-point layer? All the features will move/delete with the
> other tools.
>
> Regards
> Saber
>
> On Mon, 7 Jan 2019 at 15:55, Bernhard Ströbl <bernhard.stroebl at jena.de
> <mailto:bernhard.stroebl at jena.de>> wrote:
>
> Maybe the node tool shouldn't be available when editing a point layer?
> Anything one may want to do with points can be done using the other
> tools (move, delete part). I was always wondering why it is there
> because AFAIU nodes are not individual features, they only exist as
> part
> of a line or polygon boundary, but points in a point layer are
> individual features themselves.
>
> Bernhard
>
> Am 07.01.2019 um 16:25 schrieb DelazJ:
> > Hi Micha,
> >
> > The Node Tool is not meant to remove features, but to edit/remove
> their
> > geometries. Your feature persists in your dataset through their
> > attributes and you can later use the "Add part" tool to create a new
> > geometry.
> >
> https://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#vertex-tool
> > For full deletion (data + geometry), you should use the the "Delele
> > selected" tool, with a red bin.
> >
> > Regards,
> > Harrissou
> >
> > Le lun. 7 janv. 2019 à 16:15, Micha Silver <tsvibar at gmail.com
> <mailto:tsvibar at gmail.com>
> > <mailto:tsvibar at gmail.com <mailto:tsvibar at gmail.com>>> a écrit :
> >
> > Hi Alex:
> >
> > Linux Mint 19
> >
> > gdal 2.2.3
> >
> > QGIS 3.4.3
> >
> >
> > Just out of curiosity, I did the same on a debian buster machine
> > (QGIS 2.18) and found the same: deleting vertices (with the node
> > tool) on a point vector layer does not delete the attribute rows.
> >
> >
> > On 1/6/19 11:38 PM, Alexandre Neto wrote:
> >> What's your platform?
> >> What's the version of gdal?
> >>
> >> Thanks,
> >>
> >> Alex Neto
> >>
> >> A dom, 6/01/2019, 12:55, Micha Silver <tsvibar at gmail.com
> <mailto:tsvibar at gmail.com>
> >> <mailto:tsvibar at gmail.com <mailto:tsvibar at gmail.com>>> escreveu:
> >>
> >> I have found that after deleting some points in both a
> >> shapefile and a geopackage layer, the attribute rows
> remain in
> >> the table (with null geometry). Is this expected? I'm using
> >> 3.4.3, and I don't remember that being so in earlier
> versions.
> >>
> >>
> >> I removed the "phantom" rows by selecting by expression:
> >> '$geometry is null' and then deleting. Still the
> behavior was
> >> surprising. I hope this is not a resurrection of
> >> https://issues.qgis.org/issues/11007 ??
> >>
> >>
> >> Thanks
> >>
> >> --
> >> Micha Silver
> >> Ben Gurion Univ.
> >> Sde Boker, Remote Sensing Lab
> >> cell: +972-523-665918
> >>
> >> _______________________________________________
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> >> --
> >> Alexandre Neto
> >> ---------------------
> >> @AlexNetoGeo
> >> http://sigsemgrilhetas.wordpress.com
> >> http://gisunchained.wordpress.com
> >
> > --
> > Micha Silver
> > Ben Gurion Univ.
> > Sde Boker, Remote Sensing Lab
> > cell: +972-523-665918
> >
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>
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>
> --
> Saber Razmjooei
> www.lutraconsulting.co.uk <http://www.lutraconsulting.co.uk>
> +44 (0)7568 129733
--
Bernhard Ströbl
Anwendungsbetreuer GIS
Kommunale Immobilien Jena
Am Anger 26
07743 Jena
Tel.: 03641 49- 5190
E-Mail: bernhard.stroebl at jena.de
Internet: www.kij.de
Kommunale Immobilien Jena
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