• Introduction
• The Utility of Maps
• Producing Displays
• Point Symbolization
• Line Symbolization
• Choropleth Symbolization
• Graduated Symbol
• Grid Symbolization
• Dot Density Symbolization
  • Monovariate
  • Bivariate Monochrome
  • Bivariate Color
  • Multivariate
• Isopleth Symbolization
• Thematic Mapping
• References
• Index
• Author Index
• Symbol Index
• Site Map

Color, Bivariate, and Multivariate Symbolization

Ratio Data, and Nominal Data--Texture and Hue

Figure 8.2a: DDH.aml Ratio data displayed with dot density texture and nominal data displayed with color hue.

Color bivariate maps use texture and hue to display data. Texture should be used for numeric data, and hue should be used for nominal data.

This AML is a variant of the monochrome macro. Like that one, shade separation must not be specified lower than 0.04 inches, or ARCPLOT will hang. See DDH.aml and Figure 8.2a.

DDH <dot_lookup> <hue_lookup> {dot_size} {value} {intensity}

<dot_lookup>

specifies dot density in hundredths of PAGEUNITS

<hue_lookup>

specifies HLS hue (from 0 to 300)

{value} {intensity}

default to 50 and 100 (maximum intensity}