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I'm new to QGIS and I wonder whether there is a tool that helps to adjust the edges between two or more polygons; similar to that topology tool that's used in ArcGIS.

http://desktop.arcgis.com/en/arcmap/10.3/manage-data/editing-existing-features/aligning-an-edge-to-match-another-edge.htm


I’m searching for an equivalent to the following tool (see link):

http://desktop.arcgis.com/en/arcmap/10.3/manage-data/editing-existing-features/aligning-an-edge-to-match-another-edge.htm

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    "... adjust the edges ..." is a rather broad term. Can you be more specific? Screenshots would be very helpful. – Stu Smith Aug 16 at 15:36
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    OP most probably means that the boundaries between adjacent polygons should share exactly the same vertices and match topologically without any gaps or overlaps. – user30184 Aug 16 at 15:46
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In QGIS, this feature is called Topological Editing.

In the Snapping Toolbar, enable topological editing.

enter image description here

With topological editing enabled, when you use the Vertex Tool to move a vertex on one polygon, the same vertex on an adjacent polygon will also be moved, thus keeping the shared boundary.

enter image description here

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Try v.edit:

Edits a vector map, allows adding, deleting and modifying selected vector features.

With tool snap and a threshold distance:

enter image description here

I had to set output type area under Advanced parameters to get it to run

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