QGIS – Line Intersections

By David Crowther

Question:

Can I create Point objects where my Line layers intersect?

Answer:

Yes - in QGIS, there is the perfect tool for this – called the Line Intersections tool.

In my example below, I have a line layer for the main roads (red) and a line layer for the local roads (brown) and I wish to create a Point layer for the Road Junctions where these lines intersect.

In QGIS choose Processing > Toolbox > and open the Network Overlay section.

Choose the Line Intersections menu option and complete the window below.

• Input layer– choose the Main Road Layer.
• Intersect layer– choose the Local Road Layer.

Press Run and the tool will then calculate any intersection points between the two polyline layers.

The output will be a new Point Layer, with a point object positioned at the each of the line intersections, thus creating a Road Junction Layer.