[Qgis-user] Select vectorline automatic

[Lene Fischer]

Perfect!!!
Thanks
Regards
Lene

Fra: Neumann, Andreas [mailto:a.neumann at carto.net]
Sendt: 19. februar 2016 09:19
Til: Lene Fischer
Cc: qgis-user at lists.osgeo.org
Emne: Re: [Qgis-user] Select vectorline automatic


Hi Lene,

How about using the modulus operator in the QGIS expression?

With modulus you can select any nth line,

e.g. assuming that the tool created features where the gid advances by 1 for each feature, you could

gid % 2 = 0

selects gid with odd numbers: 0,2,4,6

or

gid % 5 = 0

would select every 5th number: 0,5,10,15,20

Hope this helps.

Just replace gid with whatever is your primary key column.

Andreas

On 2016-02-19 08:17, Lene Fischer wrote:

Hi,
I´m creating a tutorial about lawnmoving ☺ for calculating lengths ect.
I have created a graticule / vector grid with parallel lines. I want to select every second line automatic. Is there a feature for that?

Lene Fischer
Associate Professor

Department of Geosciences and Natural Resource Management
University of Copenhagen


MOB +45 40115084
lfi at ign.ku.dk<mailto:lfi at ign.ku.dk>


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