Data specialist urges GIS fixes to poll books and legislative changes to reduce residency errors
Data analyst Mark Davis told the committee that persistent poll‑book "flapping" and combo‑code errors lead to voters casting ballots in incorrect districts. He recommended monthly NCOA processing, use of county property‑tax parcel polygons overlaid on census blocks to assign district codes, and allowing in‑pollbook transfers where appropriate.
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Mark Davis, president of Data Productions and a longtime elections analyst, told the committee that persistent "flapping" (voters appearing and disappearing across poll‑book snapshots) and combo‑code assignment mistakes remain a material cause of voters casting ballots in the wrong districts.
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