[Qgis-user] Measure distance along line

[Prud'homme Jérémie]

Thanks all for your answers.

To resume the possibilities :
- Create a temporary line layer, create a line with automatic tracing on.
Get the length of the created geometry
- Use Shortest path (point to point) tool, which allow to click on two
points on the line to create a temporary line layer with the path between
the two points. Length is saved into an attribute of that new layer.
- Having the measure tool to use the tracing option would be much
appreciated by everyone :)

@Nicolas Cadieux : the $length doesn't work as I only want a part of the
original line. It works with the temp line layer, for example as label, to
display easily the length of the features (is CRS is in meter of course).

Best regards,
Jérémie.


Le ven. 30 avr. 2021 à 00:27, Nyall Dawson <nyall.dawson at gmail.com> a
écrit :

> On Thu, 29 Apr 2021 at 21:53, Prud'homme Jérémie <p.jeremie at gmail.com>
> wrote:
> >
> > Hi,
> >
> > I am wondering if it's possible to use the Measure distance tool to
> measure the distance between two places, following a line.
> >
> > For example, I click on a first place on the line, I click on a second
> place and the tool automagically follow the line.
> > Same behavior as what we can do with the use of automatic tracing for
> geaometrie creations.
>
> I'd also love to see this land in QGIS. While the measure tool
> currently works with all other layer snapping settings it **doesnt'**
> work with the tracing option. I think if QGIS allowed tracing with the
> measure tool then this use case would be handled nicely...
>
> Nyall
>
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