[Qgis-user] After deleting points, attribute rows persist
Havard Tveite
havard.tveite at nmbu.no
Tue Jan 8 00:02:43 PST 2019
I agree that disabling the vertex tool for point layers is a good
idea. It will improve consistency and avoid confusion.
A separate tool for moving a part of a multi-geometry would be
useful.
Håvard
On 08. jan. 2019 07:53, Bernhard Ströbl wrote:
> 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
>
>
--
Håvard Tveite
Faculty of Science and Technology, NMBU
Drøbakveien 31, POBox 5003, N-1432 Ås, NORWAY
Phone: +47 67231548 Web: http://www.nmbu.no
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