Crime Doesn't Happen Everywhere Equally. Find the Heat or Get Burned.
The only time it's socially acceptable to stare at a map for three hours.
"Crime doesn't happen everywhere equally. Find the heat or get burned."
Crime is not random. It clusters in space and time, and understanding where and when these clusters form is one of the most powerful tools in a crime analyst's arsenal. Hot spot analysis moves beyond simple pin-mapping into statistical methods that separate signal from noise. In this lesson, you will learn to identify the three fundamental types of hot spots, choose between KDE and Gi* statistics for different analytical problems, factor temporal patterns into your spatial analysis, and recognize when the same victims keep appearing — because that is where the next crime is most likely to occur.
Translation: if you are not looking at the map, the map is looking at you — and judging your quadrant-based approach.
You are given the following summary of a six-month crime analysis for a mid-size police district. Your task: identify which analytical missteps were made and propose a corrected approach.
"We ran Gi* on all reported burglaries for District 7 using a 500-meter fixed distance band. Nothing was statistically significant, so we concluded there are no burglary hot spots. We also created a KDE map of all crimes combined (burglaries, robberies, assaults, vehicle thefts) and found a large red area in the downtown core. That must be where all the crime is. Finally, we noted that one apartment complex had been burglarized 14 times over the period, but since Gi* showed no significance at the district level, we did not flag it."
Identify at least four analytical errors in this summary. For each error, explain what should have been done differently. Consider: spatial method selection, temporal segmentation, aggregation, repeat victimization, and the relationship between exploratory and confirmatory analysis.
TL;DR: A map of all crimes at all times averaged together is not an analysis — it is a screensaver. Get temporal or get lost.
