Department of Commerce, Census Bureau, Geography Division, and ESRI, 20050401, U.S. Census Urbanized Areas: ESRI® Data & Maps 2005, ESRI, Redlands, California, USA.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000009. Longitudes are given to the nearest 0.000009. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
| Formal codeset | |
|---|---|
| Codeset Name: | Urbanized Area Five-Digit Census Codes |
| Codeset Source: | Department of Commerce, Census Bureau |
Names for the features.
| Value | Definition |
|---|---|
| 75 | Urbanized Area. |
| 76 | Urban Cluster. |
| Value | Definition |
|---|---|
| Urbanized Area, Urban Cluster. | Legal/Statistical area descriptions of the feature. |
Populations for the features.
Calculated populations per square mile for the features.
Numbers for the features.
Numbers for the features.
Calculated areas for the features.
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U.S. Census Urbanized Areas provides information about the locations, names, and urban codes of urbanized areas primarily for national planning applications.
Department of Commerce, Census Bureau, Geography Division, 20000101, 2000 Urbanized Areas: Urbanized Areas 2000, Department of Commerce, Census Bureau, online.Online Links:
ESRI Business Information Solutions, 2003 ESRI Business Information Solutions, Vienna, Virginia, USA.
For Census 2000, UA delineations constitute a "zero-based" approach that requires no "grandfathering" of UA boundaries from the 1990 census. Because of the more stringent density requirements (and the less restrictive extended place criteria), some territory that was classified as urbanized for the 1990 census has been reclassified as rural. In addition, some areas that were identified as UAs for the 1990 census have been reclassified as urban clusters.
The title of a UA may contain up to three incorporated place names, and will include the two-letter U.S. Postal Service abbreviation for each state into which the UA extends. However, if the UA does not contain an incorporated place, the UA title will include the single name of the geographic entity that occurs first from the following list: census designated place, minor civil division, or populated place recognized by the U.S. Geological Survey.
Each UA is assigned a five-digit census code in alphabetical sequence on a nationwide basis, interspersed with the codes for urban clusters (UCs), also in alphabetical sequence. For the 1990 census, the U.S. Census Bureau assigned a four-digit UA code based on the MA codes. For Census 2000, a separate flag is included in data tabulation files to differentiate between UAs and UCs. In printed reports, this differentiation is included in the name.
Data sources produced in this process:
Data sources used in this process:
After processing, the data set is checked for drawing display and number of records and file sizes compared with source materials.
No duplicate features are present. The shapefile is converted to SDC (Smart Data Compression) format in ArcSDE®. This verifies and validates the geometry.
Are there legal restrictions on access or use of the data?
- Access_Constraints: Access granted to Licensee only.
- Use_Constraints:
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The redistribution rights for this data set: Public domain data from U.S. government is freely redistributable with proper metadata and source attribution.
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Offline Data
See use constraints.
| Data format: | SDC The SDC file contains the geospatial and attribute data. The SDI file contains the spatial and attribute indexes. The PRJ file contains the coordinate system information (optional). The XML file (*.sdc.xml) contains the metadata describing the data set (optional). Size: 2.370 |
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To use this data requires software that supports SDC files.
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