The slick Trulia Crime Maps [trulia.com] aims to give the masses the opportunity to understand what is "really" happening in their local neighborhood. The interactive geolocated heatmap visualizes where crimes happen most, what types of crimes those are, and when they actually happened. In addition, locals and passers-by have the opportunity to comment and discuss what is 'actually' going on in their environment through the online interface.
The map is now available for over 50 metro areas, and includes more than 5 million data points aggregated from more than 1,000 different sources. Neighborhood blocks are colored according to crime density: the top 5 percent of blocks with the most crimes are colored dark red, the next 5 to 10 percent in light red, and so on.
On crimes, see also:
. San Francisco Crime Spotting
. Mapping Homicides in New York City
. London Police Statistics Sculpture
. U.S. Neighborhood Heat Maps
. and the very first: Oakland Crime Spotting.