It is possible to create heat maps using Google Fusion Tables. This is just one feature of mapping using Google Fusion Tables. A heat map is a method of point data visualization that shows the density of points in a given area. To make a heat map from a Google Fusion Table map, simply check the “Display as heat map” box above the map.
Here is an example of a heat map showing the distribution of a fictional client population. This map is based on a set of similated clinical data used to create several types of display:
You can view the data table that generates this heat map on Google Drive:
The underlying map is also available on Google Drive: