Is there a plugin available that will calculate this?
EDIT 1:
The red polyline is the average distance of the point to the black polyline. The red polyline is what I want to display. Alternatively, is there something which would calculate the radius of the circle so I can use a buffer?
Best Answer
Using QGIS and GRASS, this should be doable:
I'm sure there is a GRASS alternative to distance matrix (v.distance?). As far as I know, there is no equivalent to v.segment in QGIS yet.