1 / 31

Auditing 9-1-1 GIS Data Proving What You Have

Auditing 9-1-1 GIS Data Proving What You Have. Indiana GIS Conference February 2010. Decide on what you want to verify Identify/Establish Accuracy Standards Techniques for verifying data Techniques used in the KY Geospatial audit Issues discovered Options implemented for correction

abel
Download Presentation

Auditing 9-1-1 GIS Data Proving What You Have

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Auditing 9-1-1 GIS Data Proving What You Have Indiana GIS Conference February 2010

  2. Decide on what you want to verify Identify/Establish Accuracy Standards Techniques for verifying data Techniques used in the KY Geospatial audit Issues discovered Options implemented for correction Benefits of self audit Overview

  3. The most important components of a GIS are people. Trained people, who understand GIS as well as E9-1-1, play a vital role in a successful GIS. People, who create and maintain the data as well as those who use the GIS are key to successful E9-1-1 implementation. The procedures, processes, and techniques these people use in developing and using a GIS are critical to reaching an informed decision. What’s Important?

  4. No matter where you get your data, you have to assume responsibility for the accuracy, completeness, and currency of the data. The map data must agree with the MSAG data, otherwise the ALI will not display the correct information on the visual map. A Public Safety Answering Point Managers’Guide to Geographic Information Technology, A National Emergency Number Association White Paper, October 2002 What’s Important

  5. General GIS data Geocoding accuracy Centerline accuracy Wireless 9-1-1 information Is the right information being provided? How accurate is that information? Both What to Test

  6. Geocoding Accuracy How close does it need to be? State or local choice In Kentucky geocoding results shall be accurate to within 0.1 mile Centerline Accuracy Accurate representation of the roadway? How close does it need to be? Standards? What Standards?

  7. Wireless data standards FCC Standards are based on a national view Network Based Location Solutions 95% of the time <= 300 meters (984 feet) 67% of the time <= 100 meters (328 feet) Handset Based Location Solutions 95% of the time <= 150 meters (492 feet) 67% of the time <= 50 meters (164 feet) Standards? What Standards?

  8. Identify or establish what you will use locally. National, state, local. Treat it like a law, you may be stricter than the higher jurisdiction but never less. Document the accepted standards. Makes it easier to repeat the process. Makes it easier to compare results and measure improvement. Local Standards

  9. The Commercial Mobile Radio Service Emergency Telecommunications Board (CMRS Board) is charged with administrating the CMRS fund for the purpose of implementing wireless emergency Enhanced 911 service throughout Kentucky in accordance with State and Federal Legislation and Regulations. Kentucky Geospatial Audit Authority

  10. (4) Each PSAP's mapping shall be tested for the accuracy of road centerline data. A minimum of twenty (20) randomly-selected address points shall be tested in each PSAP response area. If a PSAP response area encompasses multiple counties, a sampling of a minimum of twenty (20) randomly-selected address points per county shall be tested. Tested locations shall:       (a) Be distributed across the PSAP response area to yield a valid cross section of urban and rural environments;       (b) Plot on the correct side of the street as shown on the base map data supplied by the PSAP;       (c) Plot within the correct cross streets as shown on the base map data supplied by the PSAP; and       (d) Plot within one-tenth (1/10) of a mile of their location on PSAP supplied base maps. 202 KAR 6:100

  11. 20 random points Process to generate 20 random points through out the jurisdiction. Distributed between urban and rural. Think incorporated and unincorporated Think city and township Hawth Tools Generate 20 points per county Generate 3 points per incorporated area Snap to centerlines Random selection of 20 final points from combined set Standards Influence the Process and Techniques

  12. Data must plot within certain parameters to supplied data What elements should be compared? Field collected points both XY and field collected addresses Using GPS equipment Navigate to the random point Identify the nearest posted address and record address Take a GPS fix of the driveway or actual structure Repeat as necessary Standards Influence the Process and Techniques

  13. Standards Influence the Process and Technique

  14. Equipment used: ArcView with Network Analyst Trimble GeoXT with external antenna ArcPad 7.x on laptop Digital camera Access Standards Influence the Process and Technique

  15. Collected data in 120 counties and 5 additional PSAP jurisdictions 2666 data points collected Teams traveled more than 13,000 road miles Overview of the Initial Kentucky Audit

  16. Overview of the Initial Kentucky Audit

  17. Test collected data Test in the dispatch office with the data being used there and the mapping solution being used. Discoveries 46% of the field data points failed the standards. GIS data not necessarily the same as in the dispatch office. Out of date data in dispatch More current in dispatch center Mapping solutions did not display data according to the standards. Did not offset to left or right of centerline segment Introduced rounding errors that reduce accuracy Would not accept LAT LONG entry Applying the Standards

  18. PSAPs that passed Very involved in address assignment and GIS data maintenance Active communication and data exchange between governmental agencies and emergency services Proactive on data verification and validation Results of 1st part of Geospatial Audit

  19. PSAPs that did not pass Reviewed results and created a correction plan Data improvement Software/hardware updates and changes Improving communication and data exchange All PSAPs re-audited have passed showing significant improvement in data and function Results of 1st part of Geospatial Audit

  20. Update, upgrade, change mapping solution Several software issues were corrected by the vendors of the CAD/Mapping solutions. Update, correct, rebuild GIS data Scrub and correct all segment ranges reflecting actual ranges and not theoretical ranges Develop point address layer Correction Plans

  21. (3) Audits shall verify that upon receipt of a wireless 911 call the PSAP's mapping component shall: 1. Display the X, Y coordinates on digital base maps used by the PSAP; 2. Identify the incoming 911 call on the map display; and 3. Identify the closest assigned address to the X,Y [of the caller] coordinates provided; or (b) In the absence of the X, Y coordinate information, [of the caller] identify the cell site, and cell-face. [CMRS interpretation is that it should be done automatically upon receipt of the call] Wireless Data Audit Criteria

  22. Currently the majority of wireless 9-1-1 calls are routed to PSAPs based on tower face. Next Generation 9-1-1 (NG9-1-1) will incorporate routing based on X, Y. Why this Criteria?

  23. Tower Sectors • Most Towers are divided into “faces” or “sectors” • Each has a unique routing number and should have a unique address entry. • 123 Any St – NW • 123 Any St – E • 123 Any St – SW • pANI/ESRD/ESRK directly related to cell face/sector

  24. Tower Sectors

  25. Function or accuracy or both If accuracy, consider auditing the accuracy of the data provided with the intent of fully understanding the capabilities of the current implementations. Do not expect to take the data and bring about change in the wireless carriers Wireless Audit

  26. #1 – Analysis of data captured at the PSAP Run a report for wireless calls that are related to a specific street address. Plot distribution of the X, Y data provided. Compare the X, Y data provided with the address data. Test if it meets the wireless criteria. Wireless Audit Approach

  27. Wireless Audit Approach

  28. #2 – Field data collection Navigate to random addresses similar to the approach described earlier Make test 9-1-1 calls Compare the collected X, Y with the address Wireless Audit Approach

  29. Some Phase II calls acted as Phase I calls X, Y was of the receiving tower X, Y did not change with rebid Large variance in location accuracy Issues based on system being used Some very accurate Some very inaccurate Wireless Audit Findings

  30. Opportunity to get more people involved Identifies areas for improvement Provides a better product A better product means better service Benefits of a GIS Audit

  31. James Morse GIS Project Manager Stantec Consulting Services Inc. 1901 Nelson Miller Parkway Louisville, Kentucky 40223Ph: (502) 212-5044Fx: (502) 212-5055james.morse@stantec.comstantec.com Questions?

More Related