GIS Crash Analysis for Beginners: Custom Applications to Assist Novice GIS Users in Crash Data Analysis.

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Presentation transcript:

GIS Crash Analysis for Beginners: Custom Applications to Assist Novice GIS Users in Crash Data Analysis

GIS Analysis Tools  Performs Standard Queries –Normalize Data –Reduce Errors  Allows Data Query To Follow On Spatial Selection/Associa tion  Provides Common Dbf IV Output Table

Standardize Queries  Normalize Data –Many Crash Data Questions Examine Multiple Fields –Allows User Without Relational Database Management Skills to Review Complex Data  Reduce Error –Canned Queries Assure Desired Result –Two Analysts Will Arrive At Same Conclusion  “Nest” Queries –Allows User to Sequence Multiple Queries for Complex Analysis 1.Pedestrian 2.+ Bicycle 3.Night 4.Fatal or Severe Injury

Select a Standard Query

Defines Query

Nest Query

Select “or” Query

Add Bicycle Crashes to Selection

Defines Query

Select “and” Query

Automatic Population of ‘Drop-Down’

Select Fatal Crashes From Selection

Convert Query Results to Map ‘Theme’

Review Summary Data for a Specific Event Retrieve Scanned Crash Report

Spatial Selection/Data Association  Select Crashes Manually Using Built-in Tool  Use ‘Overlay’ Capability to Select Crashes –Proximity to Schools –Specific Neighborhoods/Planning Areas  Correlate Spatial Attributes with Crash Data –Vehicle per Household vs. Bike/Ped Crashes –Roadway Classification

Common DBFVI File Format  Opens Easily in Excel or MS-Access  Macros or VBA Allow Quick Chart and Report Production –Frequency by Attribute Charts  Supply Data to Clients in Common Format

Compare Corridor to State/County

Compare Intersection to Corridor/State

Contact Info: Demian Miller Tindale Oliver & Assoc. Tampa, FL