Seen it, done it
We spent several months developing such a system for one of the UK's forces. Crimes in this country are categorised by various home office classes and sub-classes so you could get a general impression of type of crime, e.g., Violent, Theft, Motor Vehicle, "Other" etc. for an area. Depending on the recording systems used, we had data down to the nearest meter, but that obviously depends on how well the crime is recorded in the first place.
We produced a system that you could drill down by crime type and by geographic area, viewing crimes, detections, sanctioned detections and so on. We also took it further to allow you to view officer "performance" - number of arrests, stop and searches, hours worked etc., etc. Basically a big old data-mining exercise all from a pretty intranet front-end.
There was certainly talk of putting that information online for the general public at some point - although the point of "Child abuse at numbers 3-7" was certainly looked at and we would either have simply not included that data or would not have allowed you to drill that far down into the crime groupings.
All forces are required to submit pretty detailed crime statistics - usually by ward and crime grouping and they often partner with local government for "safer streets" type activities.
If you want to know specific information, you could always file a FOI request. They love doing that sort of thing...