The Repeat and Near Repeat Classification tool classifies each incident as either an originator, repeat, or near repeat incident according to user-specified distance and time parameters. The tool adds a field for each distance and time band combination to the input layer. A line feature class is created to link related incidents to help visualize the spatial and temporal relationships between incidents. It also produces a summary report to help you understand the proportionality of repeat or near repeat incidents within your dataset.
To classify your incidents, complete the following steps:
- In ArcCatalog or the Catalog window in ArcMap, browse to MapsandGeodatabase\CrimeAnalysisTools.tbx\Repeat and Near Repeat Analysis toolset and open the Repeat and Near Repeat Classification tool.
- In the Input Feature Class parameter, choose the Burglaries layer.
- In the Date Field parameter, choose the OFFENDATE field.
- In the Summary Report Location parameter browse to the MapsandGeodatabase directory and select the Output folder, then click Add.
- In the Repeat Incident Distance parameter enter value of 1 to set the maximum distance between features.
- In the Spatial Bands parameter type 500, 1000, and 1500 to create three spatial bands that are 500 feet from the originator incidents.
- In the Temporal Bands parameter type 7, 14, and 21 to create three temporal bands of 7 days from the date of the originator incidents.
- In the Incident Connections Workspace parameter browse to the MapsandGeodatabase folder and select the CrimeAnalysis.gdb, then click Add.
- Type a name in the Incident Connections Feature Class Name parameter. If the workspace already contains a dataset of this name, the existing dataset will be overwritten.
- Click OK.
- Symbolize the Burglaries using the s1000t7 field added to the table.
- Symbolize the Connections layer using the RPTDAYS (repeat days) field to indicate the number of days between each incident.