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Alameda County Board of Education District with trustee area boundaries; boundaries have been updated to show changes for 2011-2012 redistricting. Boundaries represent voting districts (i.e., district designation for each address) and therefore may align with parcel boundaries in cases where parcels (and sometimes residences) are divided by the true city/district boundary.
Census Tracts within Alameda County. Boundaries have been aligned with Alameda County basemap layers, such as parcels, voting precincts, and street centerlines.
City boundaries within Alameda County. Boundaries represent voting city (i.e., city designation for each address) and therefore may align with parcel boundaries in cases where parcels (and sometimes residences) are divided by the true city boundary. (See City Limits layer created by Alameda County Community Development Agency for true city limits boundaries.)
Community College Districts, within the extent of Alameda County; boundaries have been updated to show 2011-2012 redistricting changes. Boundaries represent voting districts (i.e., district designation for each address) and therefore may align with parcel boundaries in cases where parcels (and sometimes residences) are divided by the true city/district boundary.
Unified School Districts with district and trustee area boundaries, within the extent of Alameda County; boundaries have been updated to show changes for Oakland 2013 redistricting and new Dublin USD Trustee Areas in 2018. Boundaries represent voting districts (i.e., district designation for each address) and therefore may align with parcel boundaries in cases where parcels (and sometimes residences) are divided by the true city/district boundary.
U.S. ZIP Code Areas (Five-Digit) represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a five-digit ZIP Code divides the United States into 10 large groups of states numbered from 0 in the Northeast to 9 in the far West. Within these areas, each state is divided into an average of 10 smaller geographical areas, identified by the second and third digits. These digits, in conjunction with the first digit, represent a sectional center facility or a mail processing facility area. The fourth and fifth digits identify a post office, station, branch or local delivery area.