I'm looking for suggestions/examples of tools or APIs that enable the mapping of large amounts of time series data into an intensity map.

The data includes dimensions for country, series, and year. Here's an example <http://spreadsheets.google.com/ccc?key=t9ZwziZAgy768ZTXDEg8Maw&authkey=CPn0pdoH&hl=en_GB&ui=1>