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

[Nyall Dawson]

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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