[Qgis-user] Symbol lines every km, moving when changing scale or moving map

[Prud'homme Jérémie]

Hi,

Thank you very much Nyall, this one was pretty well hidden.

With clipping unchecked, behavior is as expected for my use case.


Jérémie.


Le jeu. 18 févr. 2021 à 23:29, Nyall Dawson <nyall.dawson at gmail.com> a
écrit :

> On Wed, 13 Jan 2021 at 06:33, Prud'homme Jérémie <p.jeremie at gmail.com>
> wrote:
> >
> > Hi,
> >
> > I'm using QGIS 3.10.
> >
> > I tried to use only symbology to display a stroke every km along a road.
> > The project CRS is 2154 (Lambert 93).
> >
> > When adding a ""symbol line" with an interval of 1000 map units (meter
> for 2154) – or 1000 meters at scale, same result – I achieve to display
> symbols every km.
> >
> > Problem is when I move the map or change scale, the symbols do not
> always stay in place. They are sometimes misplaced.
> >
> > I've been told that problem can be that the first node of the line is
> not always the reference to calculate the intervals.
>
> From the bottom of the symbol widget, click the "Advanced" button and
> uncheck "Clip features to canvas extent".
>
> Nyall
>
>
>
> >
> > You can find a GIF here that displays my problem :
> https://zupimages.net/viewer.php?id=21/02/nvr2.gif
> >
> > Circles are symbols via Symbology.
> > Strokes are symbos on points generated vith the tool "Points along
> geometry".
> >
> > You can see that circles are not always at the same place as the strokes.
> >
> > Is it a "normal" behavior ?
> > Anyway as a user I would expect that symbols are always generated at the
> same place from the starting node.
> >
> > Thanks for your enlightments on this.
> >
> > Jérémie.
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