<div dir="ltr"><div>Hi, <br></div><div><br></div><div>Not sure if/how I can help on this benchmark.</div><div>If I understand well you want to know if disabling the simplification on the marker line symbol layer only would make a huge difference or not on rendering performance. But as far as I saw the option is only available for the whole layer at the moment.</div><div><br></div><div><br></div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Jérémie.<br></div></div></div></div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le ven. 19 févr. 2021 à 22:25, Nyall Dawson <<a href="mailto:nyall.dawson@gmail.com">nyall.dawson@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Fri, 19 Feb 2021 at 23:00, Andreas Neumann <<a href="mailto:a.neumann@carto.net" target="_blank">a.neumann@carto.net</a>> wrote:<br>
><br>
> Hi Jérémie,<br>
><br>
> Ah good to hear!<br>
><br>
> I'm not a big fan of this fact that line simplification is turned on by default in QGIS. I believe that users should consciously turn it on if they want it!<br>
<br>
I'd be interested to see some benchmarks of disabling vs enabling<br>
simplification for the marker line symbol layer alone. If it's not too<br>
expensive, we could skip it automatically for line marker symbol<br>
layers (it makes a HUGE difference to the rendering speed for simple<br>
line layers and other symbol layer types, but the intention is that<br>
the results should be visually identical to no simplification).<br>
<br>
Nyall<br>
<br>
><br>
> Your example shows that it can lead to confusion (understandably).<br>
><br>
> Good that it works now. Note that you can override this setting on a per layer base in the layer properties - so not all layers need to have the same setting.<br>
><br>
> Greetings,<br>
><br>
> Andreas<br>
><br>
> On 2021-02-19 13:40, Prud'homme Jérémie wrote:<br>
><br>
> Hi,<br>
><br>
> I had simplification turned on, indeed...<br>
><br>
> I deactivated it :<br>
> - in the Options as you mention, so that it is deactivated for newly added layers<br>
> - in my layer options (Rendering properties)<br>
><br>
> And it is ok now.<br>
><br>
> It makes sense that if the line is simplified the distance vary !<br>
><br>
> Thanks Andreas.<br>
><br>
><br>
> Jérémie.<br>
><br>
> Le ven. 19 févr. 2021 à 11:12, Andreas Neumann <<a href="mailto:a.neumann@carto.net" target="_blank">a.neumann@carto.net</a>> a écrit :<br>
><br>
> Hi Jérémie,<br>
><br>
> Do you have geometry simplification turned off? See "Settings" --> "Options" --> "Rendering" --> "Enable feature simplification ..."<br>
><br>
> Make sure this is deactivated (I think it is enabled by default).<br>
><br>
> Greetings,<br>
><br>
> Andreas<br>
><br>
><br>
> On 2021-02-19 11:05, Prud'homme Jérémie wrote:<br>
><br>
> Tested too fast :(<br>
><br>
> Behavior is ok when zooming in, but still problems when zooming out (whereas the entire feature is visible !).<br>
> See here : <a href="https://www.zupimages.net/viewer.php?id=21/07/ehlo.gif" rel="noreferrer" target="_blank">https://www.zupimages.net/viewer.php?id=21/07/ehlo.gif</a><br>
><br>
> Circles should follow the strokes generated with the tool "Points along geometry".<br>
><br>
><br>
> Jérémie.<br>
><br>
> Le ven. 19 févr. 2021 à 10:03, Prud'homme Jérémie <<a href="mailto:p.jeremie@gmail.com" target="_blank">p.jeremie@gmail.com</a>> a écrit :<br>
><br>
> Hi,<br>
><br>
> Thank you very much Nyall, this one was pretty well hidden.<br>
><br>
> With clipping unchecked, behavior is as expected for my use case.<br>
><br>
><br>
> Jérémie.<br>
><br>
> Le jeu. 18 févr. 2021 à 23:29, Nyall Dawson <<a href="mailto:nyall.dawson@gmail.com" target="_blank">nyall.dawson@gmail.com</a>> a écrit :<br>
><br>
> On Wed, 13 Jan 2021 at 06:33, Prud'homme Jérémie <<a href="mailto:p.jeremie@gmail.com" target="_blank">p.jeremie@gmail.com</a>> wrote:<br>
> ><br>
> > Hi,<br>
> ><br>
> > I'm using QGIS 3.10.<br>
> ><br>
> > I tried to use only symbology to display a stroke every km along a road.<br>
> > The project CRS is 2154 (Lambert 93).<br>
> ><br>
> > 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.<br>
> ><br>
> > Problem is when I move the map or change scale, the symbols do not always stay in place. They are sometimes misplaced.<br>
> ><br>
> > I've been told that problem can be that the first node of the line is not always the reference to calculate the intervals.<br>
><br>
> From the bottom of the symbol widget, click the "Advanced" button and<br>
> uncheck "Clip features to canvas extent".<br>
><br>
> Nyall<br>
><br>
><br>
><br>
> ><br>
> > You can find a GIF here that displays my problem : <a href="https://zupimages.net/viewer.php?id=21/02/nvr2.gif" rel="noreferrer" target="_blank">https://zupimages.net/viewer.php?id=21/02/nvr2.gif</a><br>
> ><br>
> > Circles are symbols via Symbology.<br>
> > Strokes are symbos on points generated vith the tool "Points along geometry".<br>
> ><br>
> > You can see that circles are not always at the same place as the strokes.<br>
> ><br>
> > Is it a "normal" behavior ?<br>
> > Anyway as a user I would expect that symbols are always generated at the same place from the starting node.<br>
> ><br>
> > Thanks for your enlightments on this.<br>
> ><br>
> > Jérémie.<br>
> > _______________________________________________<br>
> > Qgis-user mailing list<br>
> > <a href="mailto:Qgis-user@lists.osgeo.org" target="_blank">Qgis-user@lists.osgeo.org</a><br>
> > List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
> > Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
><br>
><br>
> _______________________________________________<br>
> Qgis-user mailing list<br>
> <a href="mailto:Qgis-user@lists.osgeo.org" target="_blank">Qgis-user@lists.osgeo.org</a><br>
> List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
> Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
><br>
><br>
><br>
> _______________________________________________<br>
> Qgis-user mailing list<br>
> <a href="mailto:Qgis-user@lists.osgeo.org" target="_blank">Qgis-user@lists.osgeo.org</a><br>
> List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
> Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
</blockquote></div>