Sphere of influence
“The sphere of influence is the area surrounding a settlement that is affected by the settlement's activities.” From
The sphere of influence of a shop is how far people will be prepared to go to make use of that shop. For example if people decide to travel a long distances for a shop that shop will have a big sphere of influence. But if a people didn’t feel it was necessary to travel long distances to go there shop has a small sphere of influence.
The corner shops particularly has a small sphere of influence because as explained earlier in shopping hierarchy people travel by foot only talking a few minutes so meaning the person travelled a very short distance therefore a very small sphere of influence because it sells low order goods.