Help : It is important to understand the definition on how "areas" are defined. AIA - Annualized irrigated area. Does consider intensity. The AIA is defined as the sum of the irrigated areas from different seasons in a 12-month period. Typically, it is sum of irrigated areas during the season 1, season 2, and continuous and\or season 3. Boundaries - The source of administrative boundaries for the Global map is ESRI. For the Individual countries, the boundaries provided by the country. FPA - Full Pixel Aarea. GIA - Gross irrigated area = about the same as annualized irrigated areas. GIAM 10 Km - Actually, GIAM 10km product uses 10 km time-series AVHRR, 1-km SPOT vegetation, and a multitude of secondary data and ground truth data. In certain places of the World, it also uses finer resolution satellite sensor data such as JERS SAR 150 m data for the African and Amazonian rainforests. Since AVHRR 10km is the overwhelming proportion of the data used, the product is referred to as GIAM 10 km. GIAM 500 M - Global Irrigated Mapping at 500m using MODIS 500m, 7-band, every 8-day, time-series for the years 2001-03. GIAM 30 M - GIAM 30 M using LANDSAT ETM+ data for nominal year for 2000 and secondary datasets. In addition, GIAM 30m product also uses SRTM 90 m data and MODIS time-series for 1 year. IAF - irrigated area fraction. The IAF is required to compute SPA from FPA. IAF-GEE - IAF from Google earth estimate. IAF-HRI - IAF high-resolution imagery. IAF-SPDT - IAF sub-pixel de-composition technique. IIA - Intensity of irrigated areas = refers to the utilization of given irrigated area in a 12- month period. So, if 1 hectare has crop only once in 12-month period, the intensity is 100 percent. If it has crops during 2 seasons (each time for the entire area), then 2hectare/1 hectare = 200 percent intensity. NIA - Net irrigated area = about the same as TAAI. SPA - sub-pixel area. This is defined as FPA * IAF TAAC - Total area available croplans (TAAC). TAAC is the sum of the available areas from irrigated (TAAI) plus rainfed (TAAR). TAAI - Total Area Available for Irrigation. Does not consider intensity. Defined as the areas irrigated at any given point of time plus the areas left fallow at the same point of time. This is the nearest equivalent to FAO’s "areas equipped for irrigation" and the "net irrigated areas" (NIA) reported in the national statistics. TAAI is closer to NIAcreated. TAAR - Total area available for rainfed-crops (TAAR). TAAR is the area available for rainfed crop at any given point of time. It includes area actually cultivated and dependant on rainfall plus area that is left fallow. Zero - It indicates no data.