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ISO 19157 Geographic information - Data quality provides a structure for organizing comprehensive data quality assessment measures. What it doesn't provide is a priority of data quality elements for a specific dataset and jurisdiction. Over the past year, the Colorado Address Data Quality subgroup has developed a prioritized list of data quality measures for addressed locations, in an effort to establish common criteria and a scorecard. These will provide a means to describe the data compiled from multiple jurisdictions with varying origins in an objective manner so users of the data can determine their fitness for use. It also provides feedback for local jurisdictions to increase their level of quality according to their need and discretion.
In addition, the State of Colorado in coordination with the US Postal Service, the US Census Bureau, and state and local agencies will begin to provide feedback to local jurisdictions on possible discrepancies in comparison to Master Street Address Guides (MSAGs), the Coding Accuracy Support System (CASS), Statewide Colorado Voter Registration and Election System (SCORE), the Colorado Motorist Insurance Identification Database MIDB, and other datasets that contain addresses. These comparisons are particularly helpful in identifying possible omissions but also in confirming and completing georeferenced address data content. This presentation will describe the value of these comparisons and progress in developing and measuring data quality using common criteria and objective measures.