 In a distance based catchment, the area serviced will often depend on the number of visits expected to that institution by each individual.For example, it may be more acceptable to have a larger catchment for a hospital where any one individual will have few annual visits in comparison to a school where visits will be daily and hence desired distance would be closer.When a facility’s capacity can only service a specific volume, the catchment may be used to limit a population’s ability to access services outside that area.