[mcdan]

One thing they should consider doing is using the average of the surrounding points to rise or lower the score of a particular spot. For instance, near where I live there a number of examples where there is a green dot on one side of the street and a red on the other, just down the block they reverse, this doesn't make any objective sense at all.

[pimlottc]

I'd be cautious about that. You can easily have a dark foreboding alleyway just off a bright, well-lit street. Safety gradients (perceived and actual) can be quite steep.