Thematic Map Diagrams

Thematic XY Point Frequency Chart

  • A thematic map using a continuous color scale to display the frequency of XY points (which represent coordinate data) within different geographic boundaries, e.g., frequency of ozone-monitoring sites.
Example Graph

A Thematic Map Color-Coded According to the Frequency of the XY Points Within Each Polygon*

Thematic XY Point Frequency Chart

* Here, points represent coordinates of ozone-monitoring sites.