Additionally SOAs were tasked with providing complete coverage of England and Wales - this combined with the minimum population and household counts within each SOA means that large areas of agricultural, commercial and industrial land have to be included within a residential area that borders them - thus when some very deprived residential areas are mapped, a large area of supposed deprivation emerges, however most of it may not be so but rather has a wide area of relative affluence around it - these can appear to be a greater problem than many smaller completely residential SOAs in which higher concentrations of deprived people live but mixed with more affluent neighbours.