The Source for Crime and Justice Data

GIS Resources at NACJD

See the Mapping and Analysis for Public Safety (MAPS) Program website for other mapping tools.

Online Tutorial for Using NACJD Data with GIS Software

NACJD has created an online tutorial to highlight data collections freely available from the archive that can be used for mapping and spatial analysis. The tutorial provides step-by-step instructions for using NACJD data collections with ArcView 3.3, ArcGIS 8.1, and MapInfo Professional 6.5. This online tutorial consists of four parts:

  1. How to find data collections of interest
  2. How to download data from NACJD
  3. How to prepare data files for use with GIS software
  4. How to read NACJD data files into a GIS software package

Case Management and Mapping Application

This NIJ-funded project developed a prototype case tracking and mapping application for the United States Attorney's Office (USAO), Southern District of New York (SDNY). The purpose was to create a system that could collect case information and link it to specific geographic locations. This study contains the programming code used to customize the user-interface of the Microsoft (R) Access case tracking database and ArcView (R) 3.0a mapping component so that others can use the prototype as a base for creating similar applications.

MAPS Survey of Crime Mapping by Law Enforcement

While interest in crime-mapping technology within the law enforcement community appears to be growing, until recently little data existed on how widely computerized crime mapping was used, in what capacity, and which factors influenced an agency's implementation of a geographic information system (GIS). As a first step in understanding law enforcement agencies' use and knowledge of crime mapping, the Mapping and Analysis for Public Safety (MAPS) Program, formerly known as the Crime Mapping Research Center (CMRC), conducted a nationwide survey to determine which agencies were using a GIS; if so, how they were using it; and, among agencies that weren't using a GIS, the reasons for that choice. Agencies that reported using computerized crime mapping were asked how the spatial analyses were performed and the mapping maintained; what types of analyses were conducted; and which external sources funded, contributed to, and shared the data. Agencies that reported no use of computerized crime mapping were asked whether they used other electronic crime data. Both groups were asked what types of software they used, and what types of Department of Justice training would benefit their agencies.

CrimeMap Tutorial

In order to meet the demand for more widely available crime mapping training, NIJ's Mapping and Analysis for Public Safety (MAPS) Program commissioned the development of CrimeMapTutorial (R), a distance learning tool developed by Professor Wil Gorr of Carnegie-Mellon University. This tutorial enables students to learn crime mapping from their desktop or laptop computers at home or at work, and is designed for self-paced instruction. The tutorial can be used with either ArcView (TM) or MapInfo (TM) software and is currently available for download from NACJD.

CrimeStat Spatial Statistics Program

CrimeStat is a spatial statistics program for the analysis of crime incident locations, developed under a grant from the National Institute of Justice. The program is Windows-based and interfaces with most desktop GIS programs. The purpose is to provide supplemental statistical tools to aid law enforcement agencies and criminal justice researchers in their crime mapping efforts. The program inputs incident locations (e.g., robbery locations) in 'dbf', 'shp' or ASCII formats using either spherical or projected coordinates. It calculates various spatial statistics and writes graphical objects to ArcView (R), MapInfo (R), Atlas*GIS (TM), Surfer (R) for Windows, and ArcView Spatial Analyst (C).

The CrimeStat program and documentation are currently available from NACJD.

Regional Crime Analysis GIS (RCAGIS)

The US Department of Justice Criminal Division GIS Staff, in conjunction with the Baltimore county Police department and the RCAS group, has developed a Regional Crime Analysis GIS (RCAGIS). RCAGIS is an ESRI MapObjects® based system that is designed to facilitate the analysis of crime on a regional basis. RCAGIS also integrates the CrimeStat spatial statistics software package developed by Ned Levine and Associates under a grant from the National Institute of Justice. The RCAGIS System was designed specifically to assist in the analysis of crime incident data across jurisdictional boundaries.