Graph Tools

The Graph Tools panel applies utility operations to an existing graph: keep only the largest component, filter by distance, clip to a boundary, or compute an isochrone.

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.	—
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).

Note

The info box below the parameters restates what the selected tool will do before you apply it.

Step-by-step tutorial

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