As a test run, I'd like to visualize population on census blocks for a few states (New England for example). I assume that the kml to do this will be huge, when you factor in the census boundaries and population data.
How can I make my data efficient to be able to do such visualizations keeping in mind that I might extend this to having multiple census periods, and doing a time lapse combined with a flythrough?
Also note that usage of Google Earth isn't necessary. I'm open to using QGIS