FAO developed the Global Ecological Zones (GEZ) classification system after expert consultations to FRA 2000 mandated that FAO incorporate biodiversity indicators into the assessment process. The Global Ecological Zones (GEZ) classification and maps categorize FAO forest statistics into broad forest types (e.g., tropical rainforests, boreal forests etc.).

As a result of recent developments in remote sensing and the development of new spatial products and data sets related to climate and land cover, FAO commissioned FRA to update the GEZ 2000 map in 2011. The work included contributions from many scientists and partner organizations and resulted in an updated GEZ 2010 map and a technical report describing the process in detail and the changes made.