Medicare Hospital Overall Rating
With over 5000 data points on the map there's a clear issue with over plotting so the circles without fill color seemed most appropriate. The color choice of orange/gold along with varying circle sizes also seemed to best capture the hospital rating scale. The intend is to use the pre-attentive attributes of size and color intensity together. Using other combinations of colors, shapes, and size just seemed to result in a loss of the visual data interpretation.
If this visualization was published as a Tableau Dashboard or Story, the user could zoom in/out for the entire country and get some additional information via the Tooltip (details on demand) feature.
