Fig. 4. Effective mesh size (EFMS) for 1985–1989 and 2002–2004 for grassland discriminated by pilot area, subunit, and country. Dotted lines indicate the thresholds of relative change in EFMS, calculated as Δrelative = 100(YfinalYinitial)/Yinitial, where Y is the EFMS. The abbreviations indicate the subunit (letters) and pilot area (Landsat scene; numerals): NOC = Northern Campos, SOC = Southern Campos, SOP = Southern Pampa, FLP = Flooding Pampa, WIP = West Inland Pampa, FIP = Flat Inland Pampa, MEP = Mesopotamic Pampa, ROP = Rolling Pampa, 1 = 222/083, 2 = 223/081, 3 = 224/080, 4 = 224/086, 5 = 225/082, 6 = 225/083, 7 = 227/083, and 8 = 229/084. The number of grid cells included in each combination is given in Table A3.1.