Why radius matters
The ranked intersection list measures highly localized hotspots, but nearby intersections can be pieces of the same street environment. To test that effect, this map counts unique SFPD Incident Numbers inside identical circles around each hotspot center. At a tight 250 m radius, 16th & Mission leads Sixth Street 1,754 to 1,605. At 300 m, Sixth overtakes it 2,297 to 2,042; at 400 m, Sixth leads 3,327 to 2,629. This suggests 16th/Mission is the more intense localized hotspot, while Sixth Street forms the larger surrounding corridor of reported incidents. The result therefore depends on the geographic scale being measured.

Sensitivity test

radius_m	16th & Mission	Sixth Street corridor	Market/Powell–4th/Mission
250	1754	1605	1188
300	2042	2297	1456
400	2629	3327	1969
500	2804	4714	3546

Download cluster calculations (CSV)

Circles are identical radii, so this compares equal geographic areas rather than street-name groupings. SFPD coordinates are anonymized to nearby intersections.