Before revision: Differentiation , the amount of difference in appearance between the intended figure and the intended ground.Borden D. Dent, 1972, "Visual organization and thematic map design", Annals of the Association for American Geographers, p. 79-93.
After revision: or heterogeneityDifferentiation , the amount of difference in appearance between the intended figure and the intended ground.Borden D. Dent, 1972, "Visual organization and thematic map design", Annals of the Association for American Geographers, p. 79-93.