On the one hand, there is a constant need for new building land, on the other hand, an orderly settlement is strived for. The task of spatial planning is to allocate plots of land that can be built on to a building zone. If, in the course of the allocation, a decision is made to turn, for example, a parcel of land from the agricultural zone into building land, the process is referred to as zoning. If the allocation were the opposite, it would be a rezoning or a zoning out.