Here is a visualization of the 19 county region. Using your mouse you can move around on the map and zoom in close to see the labels on the data. Each of the color wedges represents a traded cluster. If the wedge extends beyond the circle that means the county has a higher than expected concentration of people employed in that cluster.
By clicking on the round buttons you can see individual businesses by their cluster. Click on the big square either return the map to a centered view or shifts you to a side view from somewhere over Topeka, KS.