CIAC CIAC Geospatial Intelligence & Crime Mapping 1 — Questions and Answers
Question 1: What is a 'crime hotspot' in geospatial crime analysis?
- A prison facility with high recidivism rates
- A geographic area with a statistically significant concentration of criminal activity (Correct answer)
- A police district with the highest arrest rates
- A neighborhood with the highest population density
Correct answer: A geographic area with a statistically significant concentration of criminal activity
A crime hotspot is a specific geographic area where crime concentrates at a rate significantly higher than surrounding areas.
Question 2: Which spatial statistics method is most commonly used to identify statistically significant crime hotspots?
- Linear regression analysis
- Kernel Density Estimation (KDE) (Correct answer)
- Chi-square testing
- Factor analysis
Correct answer: Kernel Density Estimation (KDE)
Kernel Density Estimation smooths point crime data into a continuous surface to highlight areas of high concentration as statistically significant hotspots.
Question 3: In crime mapping, what does 'near repeat victimization' describe?
- The same victim being targeted by the same offender multiple times
- The elevated risk of crime near a location where a crime recently occurred, for a limited time period (Correct answer)
- Crimes that occur in areas adjacent to police precincts
- Repeat offenders who commit crimes in the same neighborhood
Correct answer: The elevated risk of crime near a location where a crime recently occurred, for a limited time period
Near repeat victimization theory holds that a crime elevates the risk of new crimes nearby for a short window afterward, often due to the same offender returning.
Question 4: Which of the following coordinate systems is most commonly used in US law enforcement crime mapping?
- British National Grid
- WGS 84 (World Geodetic System 1984) (Correct answer)
- Universal Polar Stereographic
- Lambert Conformal Conic
Correct answer: WGS 84 (World Geodetic System 1984)
WGS 84 is the global standard coordinate system used by GPS and is the most widely adopted system in US law enforcement GIS applications.
Question 5: The 'journey to crime' concept in geographic profiling refers to:
- The investigation timeline from crime report to arrest
- The distance and route an offender typically travels from their home base to commit crimes (Correct answer)
- The geographic movement of a crime wave across a city
- The evidence chain from crime scene to courtroom
Correct answer: The distance and route an offender typically travels from their home base to commit crimes
Journey to crime research shows that most offenders commit crimes within a limited buffer around their home or anchor point, helping analysts narrow search areas.
Question 6: What is the primary purpose of 'choropleth mapping' in crime analysis?
- To track the movement of individual suspects in real time
- To display crime rates or densities across defined geographic units using color gradients (Correct answer)
- To create 3D models of crime scenes for court presentations
- To identify the exact address of a suspect using triangulated signals
Correct answer: To display crime rates or densities across defined geographic units using color gradients
Choropleth maps shade geographic units (such as precincts or zip codes) based on crime rate values, making spatial patterns easy to compare visually.
CIAC CIAC Geospatial Intelligence & Crime Mapping 1
What is a 'crime hotspot' in geospatial crime analysis?