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The historic lineage for the layer is: The Zoning Map of the Maryland-Washington Regional District in Prince George's County, Maryland dated November 29, 1949, with subsequent amendments manually drafted to 1:2400 scale WSSC grid based half sheet Mylars as annotations. WSSC grid based half sheets captured in GIS as whole sheets at 1:2400 scale in an ArcInfo library, in 1997 by CENTECH Group Inc., with the zoning layer as a second polygon attribute item named Zoning2 which was coded to \"R-P-C\". Subsequent amendments were incorporated. Data migration 2006-07, to ArcGIS 9.1 geodatabase and a SDE seamless Res_Planned_Community_Poly layer with subsequent amendments was created by extracting those features from the previous zoning layer. 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