I would like to identify which vectors connect/ intercept within the same layer. In more detail I have 1000s of vector lines and I would like to identify which lines are connected to each other without manually clicking on each trail to identify the vector id. Is there a method that I could use that saves me time on manually doing it?
I think this is what you are looking for: Youtube answer by Bhaskar Reddy Pulsani
Here are the steps in the video linked to by yair suari written out:
The approach uses the
Line intersections tool in QGIS.
In the tool GUI, select the line vector layer as both
Input layer and
Intersect layer, and use its unique ID field for both
Input unique ID field and
Intersect unique ID field. Running the tool then gives you all intersections in the line layer as a point feature.