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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
Matt Wagoner, CFM GIS Manager
James Morse, GIS Project Manager
Stantec Consulting Services, Inc.
2008 Ohio GIS Conference
September 10-12, 2008
Crowne Plaza North Hotel
Columbus, Ohio
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Background
• Process
• Results
• Observations of PSAP
• Recommendations
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Stantec
• Formerly FMSM Engineers
• Multi-Discipline consulting services firm
• Founded in 1954
• 9,000+ Employees and 125 offices in North America
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• CMRS Board • Created under KRS 65.7623
• Part of the duties are “to audit the use and quality of the geospatial data supplied by all certified Public Safety Answering Points (PSAPs).
• Funding of PSAPs from the CMRS Board will be contingent on passing the audit.
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Geospatial Requirements
• Mapping Component
• Display the X, Y coordinates of incoming wireless 9-1-1 calls on digital base maps used by the PSAP
• Identify the incoming call on the map
• Identify the closest address to the X, Y; or
• Display the cellular tower position and the face/sector of the tower
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Geospatial Requirements
• Road centerline accuracy
• Minimum of 20 random points in each county and/or each PSAP area if it is a municipal PSAP
• The points shall– Plot on the same side of the
centerline segment
– Plot between the same intersecting streets
– Plot within 0.1 mile (528 feet) of each other
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Three areas of audit– Verify the mapping component functionality– Verify the geospatial accuracy of the base maps
using the software and data in the PSAP– Verify that the wireless 9-1-1 calls process
correctly.• Phase 0, Phase 1, or Phase 2• Plot correctly• Record data correctly• Transfer correctly
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Preparation for Audit– Generate Random Points– Generate Routes– Collect Field Data– Process the Field Data for PSAP visit– Collect the PSAP data on site– Process the results– Create the reports
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Point Generation– Hawth’s Tools
• 20 random points per municipal PSAP (5 in Kentucky)
• 20 random points per county– KSP PSAPs may cover up to 8 counties for wireless 9-1-1
• 3 random points for each incorporated area within each county
• Snap to street centerlines (KYTC)
• Randomly select a total of 20 per county
• Create Master point layer
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Route Generation– ArcGIS Network Analyst
• KYTC street centerline data as base data set
• Assign timing for each segment– Differentiate between US/State, City, County
• Assuming two (2) counties per day for collection
• Create routes
• Create the Master route layer
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Route Generation– “Day Trip” or extended tour– How close is the hotel to the ending point?– Is there a hotel near the ending point?– Some roads are not what they seem.
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Field Collection– Navigate to the points– Locate the nearest visible address– GPS the address and document the address– Proceed to the next point
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Data Management– Field Data Collection
• Trimble GeoXT
• Laptop as data collector
• ArcPad 7.1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Data Management– Access Database
• Manage Field Data
• Manage Audit Data
• Generate Reports
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Observations • Some software packages do not meet the requirements of the CMRS Board– Geocode to centerline– Does not allow X, Y
entry of data– Does not automatically
display incoming wireless 9-1-1 calls to map
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Observations • Most common errors– Distance exceeded
– Left – Right ranges reversed
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Observations • Best Practices Found– Dedicated GIS personnel
– Formal data maintenance process
– Potential ranges for street segments vs. theoretical ranges
– Point addresses in addition to street centerline ranges
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Observations • Best Practices cont.– The more active that the
PSAP is in data creation, data maintenance, data QA/QC, the better they score.
– Know your data
– Understand how it is created/captured
– Understand how it is maintained
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How Accurate is your Address Data?How Accurate is your Address Data?Kentucky Geospatial Audit for 9-1-1Kentucky Geospatial Audit for 9-1-1
• Recommendations • Again – Be involved with the data and the process
• Periodically perform a self audit to check accuracy of your data
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Questions
• Matt Wagoner, GISPGIS ManagerStantecPh: (502) 212-5036Fx: (502) [email protected]
• James MorseGIS Project ManagerStantecPh: (502) 212-5044Fx: (502) [email protected]