Graph Tools

The Graph Tools panel applies utility operations to an existing graph. Select the operation from the Tool dropdown; the relevant parameters appear below it, and Apply runs it on the active graph.

Tool	Action	Parameters
Remove Isolated	Keep only the largest connected component.	(none)
Filter by Distance	Remove nodes beyond a distance from a center.	Center object, Filter Distance (CRS units).
Clip to Area	Clip the graph to a polygon boundary.	Clip Polygon object.
Isochrone	Generate a reachability polygon from a center.	Center object, Travel Cost threshold, Weight Attribute (edge cost, e.g. travel_time).

Step-by-step tutorial

For a worked example using Burjassot, follow Post-process a graph.