Just making a simple map with cirles for each crime response to show how to do a simple map with d3 v4. The polygons are the police districts for the city and it's using the soda api to get semi updated data.
xxxxxxxxxx<html><body><h1> Crime info</h1><svg id="map"></svg><script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.js"></script><script src="main.js"></script></body></html> https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.js