Feature request #13654

Enhancements to Dissolve

Added by Bernhard Ströbl over 1 year ago. Updated 6 days ago.

Assignee:Victor Olaya
Pull Request or Patch supplied:No Resolution:
Easy fix?:No


This ticket lists enhancements to Processing's Dissolve from several tickets. The enhancements should be included in QGIS 3.0.
  1. speed up dissolve algorithm, was committed in 116089e, but reverted in 64bf3a8 because of #13502
  2. dissolve on multiple fields #6040
  3. dissolve polylines #13386
  4. calculate statistics on fields not used for dissolve #6804
  5. option to dissolve only adjacent features #6801


#1 Updated by Giovanni Manghi 23 days ago

  • Easy fix? set to No

#2 Updated by Regis Haubourg 17 days ago

  • Description updated (diff)

And I would add :

- implicit topology cleaning using snap2grid + tolerance parameter to reduce the number of Geos errors for incorrect topologies border relations

(and dreaming a bit, add a true topology break step before all algorithms supposing good topology between polygons :) )

#3 Updated by Ger CO 6 days ago

Please address the issue, that currently all fields (not just the fields used as dissolve fields) are maintained. This is very confusing since we do not know whcih values of non-dissolve fields are maintained.

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