Before revision: + Property Levels and Map Symbols Level Distinction Preferred Visual Variables Secondary Visual Variables Map Examples Nominal Same or different Color Hue, Shape, Texture/Arrangement Owner, Facility type Hierarchical Qualitative amount of difference Color Hue Shape, Arrangement Languages, Geologic formation Ordinal Order Color value, Color saturation Size, Color Hue Socioeconomic status (rich, middle class, poor) Interval Quantitative amount of difference Color value Size, Color saturation, Opacity, Hue Temperature, Year Ratio Proportional difference Size, Color value, Texture density Opacity Population growth rate, population density Cyclical Angular difference Color hue, orientation Day of the year, Aspect of terrain Amount/Count Total number Size Color value, Opacity Population, Total Income Cognition and semiotics upright=1.3| One of the many signs in this map is the dark green patch .
After revision: + Property Levels and Map Symbols Level Distinction Preferred Visual Variables Secondary Visual Variables Map Examples Nominal Same or different Color Hue, Shape, Texture/Arrangement Owner, Facility type Hierarchical Qualitative amount of difference Color Hue Shape, Arrangement Languages, Geologic formation Ordinal Order Color value, Color saturation Size, Color Hue Socioeconomic status (rich, middle class, poor) Interval Quantitative amount of difference Color value Size, Color saturation, Opacity, Hue Temperature, Year Ratio Proportional difference Size, Color value, Texture density Opacity Population growth rate, population density Cyclical Angular difference Color hue, orientation Day of the year, Aspect of terrain Amount/Count Total number Size Color value, Opacity Population, Total Income Cognition and semiotics upright=1.3| The dark green patch .