Thematic Map Diagrams

Thematic Symbol Chart

  • This is a thematic map displaying XYZ scatter data where XY being coordinate data and the symbol marker representing values of a 3rd variable (Z) using a color scale as well as proportional scaling of the symbol size (relative to the Z variable data range).
Example Graph

2009 State-by-State Energy-Related CO2 Emissions (Million Metric Tons)*

Thematic Symbol Chart

* Source of data: www.eia.gov