Cloud'N'Sci.fi has released a series of Google Map heatmaps to showcase their HeatMiner service. HeatMiner is a tool that can be used to create heatmaps with pure vector graphics that can be used with a number of mapping platforms. Also you can check out a vector graphic art of World vector maps free.
The showcase includes Deer Crashes in Finland (what do you expect if you let a deer behind the wheel of a car), Traffic Noise in Helsinki and Traffic Accidents in Helsinki (that'll be those driving deer again). Source