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<p>Hi Marco,</p>
<p>When you say "curves" - do you mean "circular arcs" - I assume.<br>
</p>
<p>Yes - it is possible.</p>
<p>If you want to preserve curves, you'd have to choose a data
provider capable of storing curves. At the moment, the only two
data formats with curves supported in QGIS, are Postgis and
Geopackage, provided that you have a recent version of GDAL and
QGIS. Editing curves is part of the normal editing tools (advanced
digitizing toolbar). Maybe GML support curves - but I don't think
you can edit GML in OGR/QGIS - I may be wrong though.<br>
</p>
However, you could create curves also for data providers that don't
support curves. In that case your curve gets segmented into many
short lines - and as a consequence, you can't edit the curve
efficiently, once it is created.
<p>There is, however, a drawback if you use curves - basically
whenever you do something geometry-related, other than plain
editing or display of the data, it will be stroked - e.g. if you
split or merge a feature containing curves, it will be - again be
segementized. This is because the underlying geometry libraries
(GEOS) can't handle curves. In such cases where GEOS is used, QGIS
has to segmentize the data before feeding it into GEOS.<br>
</p>
<p>Greetings,</p>
<p>Andreas<br>
</p>
<br>
<div class="moz-cite-prefix">On 17.04.2018 16:07, Marco Dinges
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAF7j3D=p9A92QU1QbYB153xGxstgpuXtkg5k9mABRfx=A7=J=w@mail.gmail.com">
<div dir="ltr">
<div class="gmail_signature" data-smartmail="gmail_signature">Hey
guys,</div>
<div class="gmail_signature" data-smartmail="gmail_signature"><br>
</div>
<div class="gmail_signature" data-smartmail="gmail_signature">is
it possible to create simple curves with, for example, three
Points and a radius?</div>
</div>
<br>
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