Keywords
Theme:
Area, Background, Polygon, Boundary, Congressional District
Place:
United States
Place:
US Territories
Stratum:
ground
Temporal:
2007, 2006, 2008, 2009
Description
Abstract
The 111th Congressional District Boundaries data set contains geographic information for the political entities of the 111th Congressional districts.
Purpose
The data provide users with information about the locations of congressional districts, primarily for national planning applications.
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Status of the data
Complete
Data update frequency:
As needed
Time period for which the data is relevant
Date and time:
2009
Description:
publication date
Publication Information
Who created the data: U.S. Bureau of the Census (BOC), Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
Date and time:
2009
Publisher and place:
U.S. Bureau of the Census (BOC), Suitland, MD
_________________
Data storage and access information
File name: cd111
Type of data: vector digital data
Location of the data:
http://www.census.gov/geo/www/cob/cd110.html
http://www.bts.gov/programs/geographic_information_services/
Data processing environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850
Accessing the data
Data format: ESRI Shapefile
Size of the data: 7.105 MB
Data transfer size: 8.038 MB
How to decompress the file: No compression applied. However, if using digital transfer online option, note 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:
None. Acknowledgment of 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: 20090429
at time 07541300
Who completed this document
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation (RITA/BTS)
mailing and physical address:
202-366-3282 (voice)
answers@bts.gov
Standards used to create this document
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
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:
-179.147340
East:
179.778470
North:
71.352561
South:
17.884813
In projected or local coordinates
Left: -179.147340
Right: 179.778470
Top: 71.352561
Bottom: 17.884813
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Lineage
FGDC lineage
Process step 1
Process description: Individual files for the Congressional Districts in Alaska, Hawaii, Puerto Rico, and the 48 contiguous states were merged into a single data set using ARC/INFO. After completing topological and attribute verification using ARC/INFO, the data was converted into shapefile format.
Process date: 2009
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)
(202) 366-3640 (fax)
answers@bts.gov
Process step 2
Process description: Downloaded the shapefile from BOC. Downloaded congressional district information from USGS (http://www-atlas.usgs.gov/mld/cgd109p.html ) and joined the spatial with the latest attribute data on distritic reprsentatives. Used ArcGIS for topological and attribute verification.
Process date: 2007
Who did this process
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing and physical address:
202-366-3282 (voice)
202-366-3640 (fax)
answers@bts.gov
Process step 3
Process description: Downloaded the shapefile from BOC. Downloaded congressional district information from USGS (http://www-atlas.usgs.gov/mld/cgd109p.html ) and joined the spatial with the latest attribute data on district representatives. Used ArcGIS for topological and attribute verification. 110th Congressional District Boundaries did not change from the 109th.
Process date: 2007
Process step 4
Process description: Metadata imported.
Source used: C:\DOCUME~1\MARK~1.BRA\LOCALS~1\Temp\xmlF4AD.tmp
Process date: 20090429
at time 07390000
Process step 5
Process description: Dataset copied.
Process date: 20090429
at time 07495300
Sources
Source 1:
111th Congressional Districts
(TIGER)
Media: online
Contribution: Spatial information for the 110th Congressional District boundaries.
Currentness of this source
Source 2:
Techpolitics
(Techpolitics)
Media: online
Contribution: Attribute Data
Currentness of this source
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Spatial data quality
Horizontal positional accuracy
The Congressional District data set was created from TIGER/Line data having a nominal scale of 1:100,000.
Estimated accuracy: 1:
How this value was determined:
1: = Unknown
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Spatial data description
Vector data information
ESRI description
cd111
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 437
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
Feature class: SDTS feature type, feature count
cd111:
G-polygon, 437
Feature class:
Label point, 706
Feature class:
GT-polygon composed of chains, 706
Feature class:
Point, 4