Figure 2From: Geographical Information System (GIS) as a Tool in Surveillance and Monitoring of Animal DiseasesA map showing an example of how buffer zones with the distance of 5, 10, and 20 kilometres were created around a fish farm with a positive isolation of Viral haemorrhagic septicaemia virus in rainbow trout (1998) to identify nearby locations of different fish farms and slaughterhouses for fish.Back to article page