Can you share your chart screen print, I don't see any Map chart in the report definition.

Are referring Map control under Data display category?

If you don't have the Maps available under charts, you may have to download the ruleset and import it into your environment: https://community.pega.com/marketplace/components/pega-maps

See the screen shots included for the map chart configuration on one of my report definitions using a World (Countries) map. The other screen shot shows the conditional color settings to determine what color to use for countries on the map depending on the case count value. I'd like to show a legend so that users know the value range for each color used, but I don't see a way to add that. Other types of charts have settings for enabling a legend but the map charts don't seem to have that option.