Brief Guidelines to the Global Information and Early Warning System’s (GIEWS) Earth Observation Website
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Guidelines to GIEWS’ Earth Observation website in order to help the viewers with navigation through the website. The Earth Observaiton for Crop Monitoring Tool supports its analysis and supplement ground-based information. The Global Information and Early Warning System on Food and Agriculture (GIEWS) utilizes remote sensing data that can provide a valuable insight on water availability and vegetation health during the cropping seasons. In addition to the rainfall estimates and the Normalized Difference Vegetation Index (NDVI), GIEWS and FAO’s CBC Division have developed the Agricultural Stress Index (ASI). Every ten days, the System generates a map showing the hot spots around the world, where crops are affected by water stress during the growing period and the information is verified with field observations to corroborate the remote sensing analysis.