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<p>Hello Marco,</p>
<p>Note that I'm currently working on a new Algorithm that supersede
dissolve tool.</p>
<p>Here is how it should look like :</p>
<p>Name : "Aggregate" </p>
<p>Parameters :</p>
<p> * input vector layer</p>
<p> * group_by expression (field name or complex expression,
possible to add conditions on geometry predicates)<br>
</p>
<p> * geometry aggregator : collect (multipart) or combine/union
(single part)<br>
</p>
<p> * Fields aggregators, for each field :</p>
<p> aggregate function, input field, delimiter (for the
concatenate aggregator)</p>
<p> output filed definition (type, length, precision)</p>
<p> with possibility to add/remove output fields, import the
fields from an existing layer</p>
<p>The UI should looks like the Refactor Fields algorithm.<br>
</p>
<p>With this it should be possible to set a neighborhood condition
in the group_by expression.</p>
<p>Cheers</p>
<p>Arnaud<br>
</p>
<br>
<div class="moz-cite-prefix">Le 22/02/2017 à 10:32, Marco Grisolia a
écrit :<br>
</div>
<blockquote
cite="mid:CAFYjFH9woTRz1ujZM5PXh-UikqVTjpac7sMiKbp2sZj8Ws7THA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div>I recently answered to a question on GIS StackExchange [0].
In this question, the asker was looking for a way for
dissolving features using an adjacency criterion instead of
using common attribute field (please, follow the link below
for a better understanding). This feature is already available
in the analogous ArcGIS tool when the"Create multipart
features" option is enabled and I think it could be of
interest having an additional option like this in the
"Dissolve" tool main dialog for next releases.</div>
<div>I never submitted a feature request on the QGIS Project
site but, since there is already a (very rough) code and a
general idea on how to approach the issue, I didn't know if
this was the case of adding it there. Otherwise, let me know
if I need to add it on the QGIS Project site (if this is the
case, I'm sorry for wasting your time).</div>
<div>Regards,</div>
<div>Marco</div>
<div><br>
</div>
<div><br>
</div>
<div>[0] <a moz-do-not-send="true"
href="http://gis.stackexchange.com/questions/228267/merging-adjacent-lines-in-qgis">http://gis.stackexchange.com/questions/228267/merging-adjacent-lines-in-qgis</a></div>
</div>
<br>
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