The Synoptic Panel by OKVIZ is a powerful visual component for Power BI that connects areas in a custom image with attributes in the data model, filling each area with a color or with a saturation of a color related to a value or to another measure.
Starting from any image, you draw custom areas using https://synoptic.design/, which generates a SVG file you import in the component.

You can download the latest version here or install it directly from Power BI.