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

[Prud'homme Jérémie]

Hello,

Does anyone can tell me if the behavior is normal or if it is not working
as expected ?


Jérémie.


Le mar. 12 janv. 2021 à 21:33, Prud'homme Jérémie <p.jeremie at gmail.com> a
écrit :

> 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.
>
> 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 ?
> <https://zupimages.net/viewer.php?id=21/02/nvr2.gif>
> 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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