Protecting crops from pest outbreaks with vegetation maps: GroenMonitor. Farm productivity is often hit by crop damage caused by pests. Mice and other pests are difficult to detect on large farms through manual inspection alone. The GroenMonitor (GreenMonitor) is a tool that shows a current vegetation map of the Netherlands, based on satellite images and maps made publicly available through the European Space Agency (ESA). This makes pest outbreaks easy to identify and mitigate relatively quickly. In 2014, the GroenMonitor helped to identify 12,000 ha (29,652 acres) of fields affected by mice. The tool is now being exploited for various other applications, including plant phenology, crop identification and yield, identification of agricultural activities (e.g. mowing, ploughing and harvesting), nature and water management.