# Calculating shortest route distances when FROM and TO are off road

I have a shapefile of ~10,000 groundwater wells, a shapefile of ~7 points of interest, and a comprehensive road network. I am looking to create a single distance value for each groundwater well that represents the shortest distance route to the nearest point of interest, by road.

My issue (other than being a GIS novice) is that both the groundwater points and the points of interest do not lie directly on the road network. There is a distance from each of these groundwater wells to the nearest road, then that point on the road to the section of road nearest to the point of interest, and then the distance to the point of interest. And I have 10,000 wells to do.

groundwater wells = X

Points of interest = tan O

• The key seems to link the points of interest to a point on the road and go from there. Is there any cadastral information that may show access points? Then again, how important is the section between the road and a potential access point, can it be the shortest distance? Commented Dec 5, 2016 at 7:36
• Yes shortest distance is fine for my approach. I found some information support.esri.com/technical-article/000011815 and support.esri.com/technical-article/000012092 that leads me to believe I need to extend the road network to the point before I do the network analysis...
– Red
Commented Dec 5, 2016 at 7:50