Hi,
I am new to Network Analysis but have been watching some tutorials in order to complete what I thought was a basic analysis.
What I want to do is use road network data (custom) and generate a Service area using a 800m distance. I will later update the road layer to include footpaths.
What I have done:
1. Create Network dataset using my roads layer. (no elevation involved).
2. Updated properties to turn on Indexes and add Walking as a Travel Mode (not that this should matter as it is 800m either way)
3. Build
4. Import the train station as a Facility
4. Run Service Area tool
The results are not correct. The area is skewed to the N/W and there is no reason someone cannot walk/drive 800m along the easterly roads (800m). There are no restrictions as far as I am aware. I have also run Topo checks (Topo) on the road data for the following:
- Overlaps
- Intersects
- Pseudo-Nodes
- Self Intersect
As a test I drew a straight line from the station and re-ran, it picks this up! (TEST) which indicates it is the road data topo, but how!?
FYI I have also run a Repair Geometry on the roads.
Does anyone have any ideas on what is going on with the road data and why it doesn't seem to be seen as a network?
Thanks