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Description: U.S. Census Urbanized Areas represents the 2010 Census urban areas in the United States. An urban area comprises a densely settled core of census tracts and/or census blocks that meet minimum population density requirements, along with adjacent territory containing non-residential urban land uses as well as territory with low population density included to link outlying densely settled territory with the densely settled core. To qualify as an urban area, the territory identified according to criteria must encompass at least 2,500 people, at least 1,500 of which reside outside institutional group quarters. The U.S. Census Bureau identifies two types of urban areas—Urbanized Areas (UA) of 50,000 or more people and Urban Clusters (UC) of at least 2,500 and less than 50,000 people. The U.S. Census Bureau delineates urban areas that represent densely developed territory, encompassing residential, commercial, and other non-residential urban land uses. In general, this territory consists of areas of high population density and urban land use resulting in a representation of the "urban footprint."
Service Item Id: 765aaec17255409586bd9cf295612b22
Copyright Text: Roanoke County, U.S. Census Bureau
Description: The polyline feature is used to inventoy our Street Centerlines in Roanoke County. The individual polygon objects mirror our Adddress Block Ranges. Also includes attributes on lower and upper address ranges, functional classes, speed limits and others. Used as a secondary dispatch source for E911 calls.
Description: Jurisdictions is a polygon feature representing Roanoke County’s official version of the County boundary, as well as the boundary for the Town of Vinton. Roanoke County originally created this feature from County records at the County Courthouse in Salem, Va. The other jurisdiction boundaries within the feature were originally created from each jurisdictions records. Roanoke County has endeavored to reconcile its boundary with that of the surrounding localities through cooperative agreements such as the Public Safety Answering Point (PSAP) inter-jurisdictional program, Boundary and Annexation Survey (BAS) - U.S. Census Bureau, and parcel swaps though Board of Supervisor Action. Jurisdiction are maintained within the Administration Feature and is dissolved out weekly.Administration is a polygon feature consisting of the smallest statistical areas bounded by visible features such as roads, streams, railroad tracks, and mountain ridges, as well as by nonvisible boundaries such as jurisdictional limits, school district, public safety boundaries, voting precincts, and census blocks. This methodology allows for single stream editing to move coincidental boundaries across many aggregate datasets simultaneously. Administration is maintained though an ArcGIS topology class in conjunction with County Parcels and Zoning. The topology prevents self-intersection and gaps, while ensuring complete coverage amongst the participating features.
Description: The polyline feature is used to inventoy our Street Centerlines in Roanoke County. The individual polygon objects mirror our Adddress Block Ranges. Also includes attributes on lower and upper address ranges, functional classes, speed limits and others. Used as a secondary dispatch source for E911 calls.