Keywords
Theme:
Urbanized Area, Urban, Polygons, Territory
Place:
United States, US, USA, US Territories
Place:
United State of America
Stratum:
ground
Temporal:
2000, 2007, 2008, 2009
Description
Abstract
The Bureau of the Census Urbanized Area Boundaries data set contains boundary information for urban areas with a population greater than 50,000. The data set includes boundaries for urban areas in all 50 states, the District of Columbia, and Puerto Rico. A UA may contain both place and nonplace territory. The U.S. Census Bureau delineates UAs to provide a better separation of urban and rural territory, population, and housing in the vicinity of large places. At least 35,000 people in a UA must live in an area that is not part of a military reservation.
Purpose
The data provide users with information about the locations, names, and size of urban areas. The data are used primarily for national planning applications.
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Status of the data
Complete
Data update frequency:
Irregular
Time period for which the data is relevant
Date and time:
2009
Description:
publication date
Publication Information
Who created the data: US Bureau of the Census (BOC), Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
Date and time:
2000
Publisher and place:
US Bureau of the Census (BOC), Suitland, MD
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Data storage and access information
File name: boc_uza
Type of data: vector digital data
Location of the data:
http://www.bts.gov/programs/geographic_information_services/
Data processing environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535
Accessing the data
Data format: ESRI Shapefile
Size of the data: 4.607 MB
Data transfer size: 1.865 MB
How to decompress the file: No compression applied. However, if using digital transfer online option, note the access instructions.
Access instructions: The NTAD DVD can be ordered from the online bookstore at www.bts.gov. NTAD can also be downloaded from the Geographic Information Program web sit at http://www.bts.gov/programs/geographic_information_services/.
Available media: DVD
Constraints on accessing and using the data
Access constraints:
None
Use constraints:
Acknowledgment of the Bureau of the Census and the Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) National Transportation Atlas Database (NTAD) 2009 would be appreciated in products derived from these data.
Details about this document
Contents last updated: 20090403
at time 12254900
Who completed this document
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing and physical address:
Washington, District of Columbia 20590
USA
202-366-DATA (voice)
answers@bts.gov
Standards used to create this document
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000001
Longitude Resolution: 0.000001
Geographic Coordinate Units: Decimal degrees
Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
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Bounding coordinates
Horizontal
In decimal degrees
West:
-158.231956
East:
145.794619
North:
64.920865
South:
13.337161
In projected or local coordinates
Left: -158.231956
Right: 145.794619
Top: 64.920865
Bottom: 13.337161
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Lineage
FGDC lineage
Process step 1
Process description: Downloaded the Urbanized Areas from http://www.census.gov/geo/www/cob/ua2000.html. Queried out Urbanized Area from the LSAD_T column and dissolved by UA. Created the centroid of the polygon took the original NAME column and separated the column into two: Name and State.
Process date: 200403
Who did this process
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing and physical address:
202-366-DATA (voice)
Process step 2
Process description: Dataset copied.
Sources
Source 1:
Bureau of the Census Urbanized Area Boundaries
(BOC)
Media: CD-ROM
Scale denominator: 100,000
Contribution: All data contained in the file.
Currentness of this source
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Spatial data quality
Horizontal positional accuracy
The Bureau of the Census Urbanized Area database was derived from the TIGER data base. It was created from data created 100,000 or better and as such has a positional accuracy of +/- 80m.
Estimated accuracy: 1:
How this value was determined:
1: = Unknown
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Spatial data description
Vector data information
ESRI description
boc_uza
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 465
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
Feature class: SDTS feature type, feature count
boc_uza:
G-polygon, 465