A catchment area is very useful when creating your company or opening a new point of sale. It permits you to visualize your influence area on your territory and estimate their potential of business depending on isolines.
Usually, catchment areas are created by using isochrones. Isochrones are based on travel times according to different types of travelling: on foot, by car, by truck, on public transport… But they also can be draw on crows flies. Or depending on distance in kilometers or miles (isodistance).