This post introduces my long‑form article on Substack about how police agencies build and publish official crime maps in major cities.
The article looks at the methods used by police and public institutions to collect incident‑level crime data, aggregate it into neighbourhoods or grids, and turn it into the online maps that residents and travellers see when they search for “crime map” or “safe areas” in a city. It also explains some of the main limitations of these official maps, and why they can be both useful and misleading if you do not understand how they are constructed.
If you are interested in how New York City, London, Paris or Berlin present their crime data to the public – and what this means for people trying to choose safer areas to live, stay or walk – you can read the full article on Substack here: How police agencies map crime in big cities –
https://anthonynick1985.substack.com/p/how-police-agencies-map-crime-in
This “Safe Areas Project” blog will collect similar research notes and external articles, so that readers and journalists can easily follow the broader context behind the city‑level crime and safety maps.
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