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This dataset originates from CityBase_building footprints. Data was filtered by identifying City owned property and running an intersect of the TaxParcels with the buildingfootprints. Original 1979 building footprints from Chicago Aerial Survey maps. Hand digitized in the early 1990's. Data in downtown were updated using LIDAR (approx 2004) data. <\/SPAN><\/P>

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