Rating of cattle density in 2001 for the Okavango Basin. For classes of density, see the file: Note on cattle density in Basin area.xls. For Ngamiland, areas were copied from the report 'Scott Wilson and The environment and development group, 2000. Environmental assessment of veterinary fences in Ngamiland, volume 1.' . Areas of cattle density in Kavango were taken from the Kavango- cattle density shape file, while rough assessments for Angola were made from the file on population density. Origin: RAISON, and various.