CJ 425Crime Mapping

Unit 4 Seminar“Data”

Next week• Sunday 2/6 Mid term week – No Seminar• Midterm Essay Exam • Access and examine the Burglary to Motor

Vehicle Map and use the concepts in your learning from the class to:

• Discuss the information that the map contains.

• 3 -5 Pages

Midterm Essay Exam

Access and examine the Burglary to Motor Vehicle Map and use the concepts in your learning from the class to:oDiscuss the information that the map contains.

o What is it portraying?

o What is the time period being analyzed?

o Which items are line features?

o Which items are point features?

o Which items are polygons?

o What data would be considered primary data?

o What data would be considered secondary data?

oExamine the elements that are not included in the map.

o What information, if any, is not pertinent to the map?

o What additional information, if any, could be added to the map to increase its usefulness to the reader?

oAlso in your analysis, discuss which patterns you might analyze further, how you would do so, and what helped you identify those patterns. oUse at least one outside research source including academic journals to support your responses.

Midterm Essay Exam

Outline

• Types– Primary– Secondary

• Database• Sources• Integrity

Data Sources

• There are many data sources.

• These sources can be categorized as:

1. Primary

2. Secondary

Primary Data

• Data collected originally

• Surveys• Interviews• Field research• Direct observation

Secondary Data

• Data that has been collected previously

• Data collected (primarily) by another individual, group, or organization

Database

• A data matrix of stored information which can be quickly retrieve.

Queries (searches)

Select by AttributeSelect by Location

Sources of Information

• Criminal Justice• GIS• Social, political, economic• Demographic• Specific purpose

Field Trip

• http://video.esri.com/watch/148/jack-dangermond-on-a-new-modality-for-gis

Criminal Justice Data• Crime Incidents• Arrests• Calls for Service• Accidents• Property• Vehicle• Persons• Field Information or contacts• Traffic

CJ Data cont.

• Court records• Dispositions• Corrections (case files)• Probation/parole• Sex offenders• Criminal Histories

GIS Data

• Streets• City or State• Counties• Zip• Parcels• Parks• Buildings• Waterways

• Schools• ATMs• Parking lots• Malls• Landmarks• Intersections• Bus stops• Liquor Establishments

Other Sources

• Demographic• Social phenomena

Data Integrity

• Garbage In – Garbage Out

– Data Entry– Timeliness– Validity (accuracy)– Reliability (consistent)– Data transfer process– Confidentiality / Privacy– Data Management