| Abstract: |
The City of Concord implemented an emergency notification system built on ESRI ArcMap to geographically define notification areas and activate call-outs. The system is capable of automatically call each home, school and business within the selected area. The initial geocoding of the 911 telephone data did not yield satisfactory result. An accurately geocoded telephone database is crucial to ensure emergency notification messages sent out to targeted recipients timely. Successful address matching requires preparation of three components – reference data, address data and geocoding software. Data development and software customization were completed in-house to accomplish a 98% match rate. QC was performed on the master address database to improve its completeness and accuracy. The telephone data were reformatted and standardized. Geocoding rules provided by ESRI were customized to accommodate the City's unique address styles. The methods and procedures developed from this project are being used to periodically regeocode the telephone data after weekly telephone updates from Verizon are applied to the master telephone database. Other City functions also benefited from the improved address search accuracy and efficiency. |