Data scientist Lance Martin used 12 years of crime data from San Francisco's Police Department to map the city based on incidents involving specific drugs, from hallucinogens and marijuana to crack, meth, and heroin.
From "San Francisco's Drug Geography:"
The three clusters that fall out seem to show that drug similarity seems to mirror that actual geography of the city from East to West (SFPD district map shown below). CRACK has historically (remember this data goes back 12 years!) dominated in NORTHERN, MISSION, and TENDERLON. BAYVIEW, SOUTHERN, CENTRAL, and INGLESIDE have been a mix of CRACK, METH, and MARIJUANA.
"San Francisco's Drug Geography"
