Geospatial heatmaps in Amazon QuickSight
Use geospatial heatmaps to reveal patterns of marker concentration in your geospatial visuals. Heat maps display concentrations of data points using a colored overlay that highlights the intensity or concentration of the visual's markers.

To turn a geospatial map into a heat map
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Open your analysis and choose the geospatial map that you want to format. When you select a visual, it displays with a highlight around it.
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To open the formatting pane, select Format visual from the on-visual menu.
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On the formatting pane at left, choose Points.
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Choose Heatmap.
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(Optional) For Heatmap gradient, choose a color that you want for the High density and Low density values.