Parcel centroids in Allegheny County. Centroids created by the Western PA Regional Data Center using County parcel shapes found on PASDA or WPRDC. Centroids have been drawn within the parcel boundary in most cases. The Data Center also appended a number of geographic codes to the data, including 2010 Census Blocks, Blockgroups, and Census Tracts, County Subdivisions (Municipalities), School Districts, State House and Senate Districts, and Allegheny County Council Districts.