I have a point location and I would to find the 20 mile extent from that point across a road network. Effectively, I want to create a 20 mile buffer around my point but it must use the road network to determine the distance in all directions. I have tried creating distance isolines using the NetworkCostCalculator and ContourGenerator but this didn’t seem to work very well with a large distance specified (contour interval of 20 miles equivalent).
Does anyone know how I might be able to do this?
