Topoliner 0.13.3, a QGIS plugin for the topology of polygon and line coverages.

The plugin finds topology errors and separates technical debris from what may carry meaning. Debris is fixed into a new layer. Anything larger than the set thresholds goes to a layer of remaining issues with a note. The source layer is never changed.

Eleven Processing tools.

  • Polygon and line topology checks produce a layer of findings and a summary.
  • Cleanup fixes gaps, overlaps and dangles smaller than the tolerance.
  • Snapping matches the nodes and vertices of neighbours. Node insertion adds missing nodes without changing the shape.
  • Assembly check tests whether groups by attribute assemble into one body.
  • Contour input cuts a new contour into a coverage, both sides get the same cut edge.
  • Topological simplification thins a shared boundary once for both neighbours.
  • The coverage model splits a coverage into nodes and arcs.

New in 0.13.

  • QGIS 3.38-3.44 no longer crashes when a tool starts.
  • A layer with invalid geometry is read with any Processing setting, and the error reason comes from GEOS.
  • Tool 1.08 puts contours into a coverage in three overlay modes.

Works in QGIS 3.16 and later, including QGIS 4. Free and open source, GPL 3.

QGIS plugin repository: https://plugins.qgis.org/plugins/topoliner/Release and source: https://github.com/Valery35/topoliner/releases/tag/0.13.3



Discuss this on our forum.