Since I am already sending my Dump1090 data to my own database, I created a simple Google Heat Map based on my ADS-B observed data. It is a rolling 8 hours of data. As you zoom or pan the map, the loaded data will redraw within the bounds of the visible map. The map is a bit sluggish due to the amount of data that the browser has to process. I might decrease the amount of hours of data in the future to help the rendering speed.