NEON will consist of 20 Domains representing major climatic zones
Each Domain will contain a district, having a largest dimension of around 200 km
Each district will contain three Sites, having a largest dimension of around 15 km
One Site will be in an Urbanizing area, one Site will be in a Managed system, and one Site will be in a Wildland system
Each Site will be located within a low-order "watershed"