Hi @NaomiBegg
This tool talks about 'facilities' which made me think it works with polygons
Facility is only a term used to reference a point location which can be reached via a network.
So, you should consider converting your polygons of interest to points of interest. There are a number of methods to convert a polygon to point, e.g:
- Using its centroid,
- A vertice along a polygon edge,
- The centre vertice along its edge (Polygon -> Polyline -> mid-point of polyline)... etc.
The point location would be represent the location where your facility can provide the service (e.g. the entrance to a store, a train station, emergency service exit, etc...)
If a method above is not accurate enough, then you should consider adjusting the point of interest before generating the service area.