Display colored zip-based regions on Power BI map
<p>I have KML data that contains the lat/lon of the boundaries (polygons) that define Zip Code regions in the US.  I'd like display these polygons with different colors (that represent some metric in my customer data) on a MS Power BI map widget.</p>

<p>How does the data (polygons and associated metrics) need to be prepared for this to happen?</p>