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<div class="moz-cite-prefix">On 6/25/2022 6:43 PM, Richard Greenwood
wrote:<br>
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<blockquote type="cite"
cite="mid:CAHBySPZ3w1WHnkPjUeL+re4tm-rbmnKvTDOnw6rVvDF+Mq17sQ@mail.gmail.com">
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<div>At the risk of stating the obvious, all of that can be done
with labels in QGIS. A simple line can be annotated with angle
and distance, which are dynamically updated when the line is
modified. QGIS has the ability to move labels relative to the
object being labeled and supports "call outs" aka "leader
lines". Labels are not "model objects", in other words, labels
are saved in the QGIS project, not in the underlying data. </div>
</blockquote>
<br>
This is certainly true - it's just a question of how hard it is to
accomplish.<br>
Here's an example - starting with a <i>polygon </i>layer, I want
to dimension two boundaries of my property - <br>
<img src="cid:part1.bwPKLzX0.hw4GUf1C@stripfamily.net" alt=""><br>
I claim no particular expertise in this, so here's my process - <br>
Convert polygon to lines<br>
explode lines<br>
delete lines that I don't want labeled<br>
use the <a moz-do-not-send="true"
href="https://gitlab.com/GIS-projects/qgis-geometry-generator-examples/-/blob/master/QML-files/dimensions/dimensions_line-qgis3-6.qml">geometry
generator</a> provided earlier in this thread<br>
tweak half a dozen parameters buried in the geometry generator to
get the styling I want. <br>
<br>
If users are going to want to routinely add dimensions like this, it
would be far preferable to extend the annotations system to include
a linear dimensioning tool that just requires mouse clicks on two
points and a basic styling dialog. <br>
<br>
<br>
<br>
Please note that I am not particularly advocating for adding
dimension capabilities to Qgis, as I personally have no use case and
don't know whether there is a common enough need to warrant the
effort. However, I do have extensive CAD experience and was trying
to translate the CAD terminology to the GIS folks unfamiliar with
what "dimension" means in the CAD world, as there seemed to be a lot
of questions about the meaning. <br>
<br>
<br>
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