US_CongDist_Detail_TIGER500k

File Geodatabase Feature Class

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Tags
2012, Cartographic Boundary, Generalized, Shapefile, State, Congressional District, Boundaries


Summary

This high resolution polygon vector file represents the US Congressional Districts in the United States, as digitized at a 1:500000 scale. The data, current as of 2012, was downloaded from the US Census Bureau TIGER database and processed further by the TTU CGST.

Description

            

The 2012 cartographic boundary shapefiles are simplified representations of selected geographic areas from the Census Bureau's MAF/TIGER geographic database. These boundary files are specifically designed for small-scale thematic mapping. Attributes were modified to include FIPS information, name, session, area, state name and abbreviation.

When possible generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based shapefiles while others are available only as state-based files.

The downloaded file was joined with the US State Jurisdictional boundary file to get relevant attributes. The layer was then transformed from NAD 83 to WGS 84.

Credits

Use limitations

            

These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information is for visual display at appropriate small scales only. Cartographic boundary files should not be used for geographic analysis including area or perimeter calculation. Files should not be used for geocoding addresses. Files should not be used for determining precise geographic area relationships.

Extent

West  -179.147355    East  179.778455
North  71.352560    South  18.917470

Scale Range
Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

*Content type  Downloadable Data


Citation 

*Title US_CongDist_Detail_TIGER500k


Presentation formats* digital map


Resource Details 

Dataset languages* English (UNITED STATES)


Spatial representation type* vector


*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552


ArcGIS item properties
*Name US_CongDist_Detail_TIGER500k
*Size 7.040
*Location file://\\cgstdb\CGSTGeognet\Geognet\Geognet2014\USLayers2014\US_Government\USCongDist.gdb
*Access protocol Local Area Network

Extents 

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -179.147355
*East longitude 179.778455
*North latitude 71.352560
*South latitude 18.917470
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -179.147355
*East longitude 179.778455
*South latitude 18.917470
*North latitude 71.352560
*Extent contains the resource Yes

Resource Constraints 

Constraints
Limitations of use
                  

These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information is for visual display at appropriate small scales only. Cartographic boundary files should not be used for geographic analysis including area or perimeter calculation. Files should not be used for geocoding addresses. Files should not be used for determining precise geographic area relationships.


Spatial Reference 

ArcGIS coordinate system
*Type Geographic
*Geographic coordinate reference GCS_WGS_1984
*Coordinate reference details
Geographic coordinate system
Well-known identifier 4326
X origin -400
Y origin -400
XY scale 999999999.99999988
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 8.983152841195215e-009
Z tolerance 0.001
M tolerance 0.001
High precision true
Left longitude -180
Latest well-known identifier 4326
Well-known text GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],METADATA["World",-180.0,-90.0,180.0,90.0,0.0,0.0174532925199433,0.0,1262],AUTHORITY["EPSG",4326]]

Reference system identifier
*Value 4326
*Codespace EPSG
*Version 8.2.6


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name US_CongDist_Detail_TIGER500k
*Object type  composite
*Object count 439



ArcGIS Feature Class Properties
Feature class name US_CongDist_Detail_TIGER500k
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 439
*Spatial index TRUE
*Linear referencing FALSE



Distribution 

Distribution format
*Name File Geodatabase Feature Class


Transfer options
*Transfer size 7.040


Fields 

Details for object US_CongDist_Detail_TIGER500k 
*Type Feature Class
*Row count 439


Field OBJECTID
 
*Alias OBJECTID
*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source
Esri

*Description of values
Sequential unique whole numbers that are automatically generated.





Field Shape
 
*Alias Shape
*Data type Geometry
*Width 0
*Precision 0
*Scale 0
*Field description
Feature geometry.

*Description source
Esri

*Description of values
Coordinates defining the features.





Field STATEFIPS
 
*Alias STATEFIPS
*Data type String
*Width 2
*Precision 0
*Scale 0




Field CD113FIPS
 
*Alias CD113FIPS
*Data type String
*Width 2
*Precision 0
*Scale 0




Field GEOID
 
*Alias GEOID
*Data type String
*Width 4
*Precision 0
*Scale 0




Field NAME
 
*Alias NAME
*Data type String
*Width 41
*Precision 0
*Scale 0




Field SESSION
 
*Alias SESSION
*Data type String
*Width 3
*Precision 0
*Scale 0




Field AREA_SQMI
 
*Alias AREA_SQMI
*Data type Single
*Width 4
*Precision 0
*Scale 0




Field STATE_NAME
 
*Alias STATE_NAME
*Data type String
*Width 90
*Precision 0
*Scale 0




Field STATE_ABBR
 
*Alias STATE_ABBR
*Data type String
*Width 2
*Precision 0
*Scale 0




Field Shape_Length
 
*Alias Shape_Length
*Data type Double
*Width 8
*Precision 0
*Scale 0
*Field description
Length of feature in internal units.

*Description source
Esri

*Description of values
Positive real numbers that are automatically generated.





Field Shape_Area
 
*Alias Shape_Area
*Data type Double
*Width 8
*Precision 0
*Scale 0
*Field description
Area of feature in internal units squared.

*Description source
Esri

*Description of values
Positive real numbers that are automatically generated.







Overview Description
Entity and Attribute Overview
The cartographic boundary polygon shapefiles contain boundary data for a specific type of Census geography.  See the U.S. Census Bureau Geographic Terms and Concepts documentation for further explanation of Census geography (http://www.census.gov/geo/www/2010census/GTC_10.pdf).  
Below is a list of possible fields.  Attribution will vary depending on the type of geography.  Field names, descriptions and data types are listed in this format:  FIELD_NAME Description [data value or type].
AFFGEOID AFF Summary Level Code, nation identifier; nation FIPS code [string]; AFFGEOID10 2010 Census AFF Summary Level Code, nation identifier; nation FIPS code [string]; ALAND Current land area [number]; ALAND10 2010 Census land area [number]; CD113FP 113th congressional district FIPS code [string]; CDSESSN 113th congressional session code [string]; GEOID identifier, code [string]; GEOID10 2010 Census identifier, 2010 Census code [string]; LSAD Current name and the translated legal/statistical area description code [string]; LSAD10 2010 Census name and the translated legal/statistical area description code [string]; LSY Legislative session year [string]; NAME10 2010 Census name [string]; NAMELSAD Current name and the translated legal/statistical area description [string]; NAMELSAD10 2010 Census name and the translated legal/statistical area description [string]; SLDLST Current state legislative district lower chamber code [string]; SLDUST Current state legislative district upper chamber code [string]; STATEFP Current state FIPS code [string]; UACE10 2010 Census urban area code [string]; UATYP10 2010 Census urban area type [string].
The ALAND or ALAND10 field is the calculated area derived from the ungeneralized area of each entity in square miles.  This field can be used in density calculations.  Users should not calculate the area of the generalized polygons for use in any analysis.  Use the GEOID field to join these spatial tables to 2010 Census data tables if needed.  
Some nation-based files may include Puerto Rico and the Island Areas of the United States.  Island areas include American Samoa, Guam, the Commonwealth of the Northern Mariana Islands (Northern Mariana Islands), and the United States Virgin Islands.



Entity and Attribute Detail Citation
http://www.census.gov/geo/www/2010census/GTC_10.pdf





Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  8859part1 - Latin alphabet No. 1


Scope of the data described by the metadata* dataset
Scope name* dataset


*Last update 2015-01-05


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Standard or profile used to edit metadata ItemDescription


Last modified in ArcGIS for the item 2015-01-05 10:44:59


Automatic updates
Last update 2015-01-05 10:43:48


FGDC Metadata (read-only) 

Identification 

Citation
Citation Information
OriginatorU.S. Department of Commerce, U.S. Census Bureau, Geography Division/Cartographic Products Branch
Publication Date2012
Title
US_CongDist_Detail_TIGER500k
Geospatial Data Presentation Formvector digital data
Series Information
Series Name2012 American Community Survey
Issue IdentificationCartographic Boundary File
Online Linkagehttp://www2.census.gov/geo/tiger/GENZ2012/

Description
Abstract
                            The 2012 cartographic boundary shapefiles are simplified representations of selected geographic areas from the Census Bureau's MAF/TIGER geographic database. These boundary files are specifically designed for small-scale thematic mapping. When possible generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based shapefiles while others are available only as state-based files.The downloaded file was joined with the US State Jurisdictional boundary file to get relevant attributes. The layer was then transformed from NAD 83 to WGS 84.
                          
Purpose
                            This high resolution polygon vector file represents the US Congressional Districts in the United States, as digitized at a 1:500000 scale. The data, current as of 2012, was downloaded from the US Census Bureau TIGER database and processed further by the TTU CGST.
                          
Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date2012-12
Ending Date2012-12
Currentness Reference
                            publication date
                          
Status
ProgressComplete
Maintenance and Update FrequencyNone planned. New cartographic boundary files will be produced on an annual release schedule. Types of geography released may vary from year to year.

Spatial Domain
Bounding Coordinates
West Bounding Coordinate-167.650000
East Bounding Coordinate-65.221527
North Bounding Coordinate71.342941
South Bounding Coordinate-14.605210

Keywords
Theme
Theme Keyword ThesaurusNone
Theme Keyword2012
Theme KeywordCartographic Boundary
Theme KeywordGeneralized
Theme KeywordShapefile
Theme KeywordState
Theme KeywordCongressional District

Theme
Theme Keyword ThesaurusISO 19115 Topic Categories
Theme KeywordBoundaries

Place
Place Keyword ThesaurusNone
Place Keyword United States
Place Keyword US

Access Constraints
                        None
                      
Use Constraints
                        These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source.  The boundary information is for visual display at appropriate small scales only.  Cartographic boundary files should not be used for geographic analysis including area or perimeter calculation.  Files should not be used for geocoding addresses.  Files should not be used for determining precise geographic area relationships.
                      
Point of Contact
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Department of Commerce, U.S. Census Bureau, Geography Division
Contact Address
Address Typemailing
Address4600 Silver Hill Road
CityWashington
State or ProvinceDC
Postal Code20233-7400
CountryUnited States

Contact Voice Telephone301.763.1128
Contact Facsimile Telephone301.763.4710
Contact Electronic Mail Addressgeo.geography@census.gov

Native Data Set Environment
Files were generated by U.S. Census Bureau Linux-based batch generalization software. FME (by Safe Software) was used to convert polygons from Oracle Spatial format into ESRI shapefile format.

Data Quality 

Attribute Accuracy
Attribute Accuracy Report
                            Accurate against American National Standards Institute (ANSI) Publication INCITS 446-2008 (Geographic Names Information System (GNIS)) at the 100% level for the codes and base names present in the file.  The remaining attribute information has been examined but has not been fully tested for accuracy.
                          
Logical Consistency Report
                        The Census Bureau performed automated tests to ensure logical consistency of the source database.  Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area.  All polygons were tested for closure. The Census Bureau uses its internally developed geographic update system to enhance and modify spatial and attribute data in the Census MAF/TIGER database.  Standard geographic codes, such as FIPS codes for states, counties, municipalities, county subdivisions, places, American Indian/Alaska Native/Native Hawaiian areas, and congressional districts are used when encoding spatial entities.  The Census Bureau performed spatial data tests for logical consistency of the codes during the compilation of the original Census MAF/TIGER database files.  Feature attribute information has been examined but has not been fully tested for consistency.
                      
Completeness Report
                        The Cartographic Boundary Files are generalized representations of extracts taken from the MAF/TIGER Database. Generalized boundary files are clipped to a simplified version of the U.S. outline. As a result, some off-shore areas may be excluded from the generalized files. Some small holes or discontiguous parts of areas are not included in generalized files.
                      
Lineage
Source Information
Source Citation
Citation Information
OriginatorU.S. Department of Commerce, U.S. Census Bureau, Geography Division
Publication Dateunpublished material
Title
Census MAF/TIGER database

Type of Source MediaGeo-spatial Relational Database
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date2012-01-01
Ending Date2012-01-01
Source Currentness Reference
The dates describe the effective date of 2012 cartographic boundaries.
Source Citation Abbreviation
MAF/TIGER
Source Contribution
                                All spatial and feature data
                              
Process Step
Process Description
                                Spatial data were extracted from the MAF/TIGER database and processed through a U.S. Census Bureau batch generalization system.
                              
Source Used Citation Abbreviation
MAF/TIGER
Process Date2012-12


Spatial Reference 

Horizontal Coordinate System Definition
Geographic
Latitude Resolution0.000458
Longitude Resolution0.000458
Geographic Coordinate UnitsDecimal degrees

Geodetic Model
Horizontal Datum NameNorth American Datum of 1983
Ellipsoid NameGeodetic Reference System 80
Semi-major Axis6378137.000000
Denominator of Flattening Ratio298.257222

Entities and Attributes 

Detailed Description
Entity Type
Entity Type LabelUS_CongDist_Detail_TIGER500k

Attribute
Attribute LabelOBJECTID
Attribute Definition
Internal feature number.
Attribute Definition SourceEsri
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

Attribute
Attribute LabelShape
Attribute Definition
Feature geometry.
Attribute Definition SourceEsri
Attribute Domain Values
Unrepresentable Domain
Coordinates defining the features.

Attribute
Attribute LabelSTATEFIPS

Attribute
Attribute LabelCD113FIPS

Attribute
Attribute LabelGEOID

Attribute
Attribute LabelNAME

Attribute
Attribute LabelSESSION

Attribute
Attribute LabelAREA_SQMI

Attribute
Attribute LabelSTATE_NAME

Attribute
Attribute LabelSTATE_ABBR

Attribute
Attribute LabelShape_Length
Attribute Definition
Length of feature in internal units.
Attribute Definition SourceEsri
Attribute Domain Values
Unrepresentable Domain
Positive real numbers that are automatically generated.

Attribute
Attribute LabelShape_Area
Attribute Definition
Area of feature in internal units squared.
Attribute Definition SourceEsri
Attribute Domain Values
Unrepresentable Domain
Positive real numbers that are automatically generated.

Overview Description
Entity and Attribute Overview
                            The cartographic boundary polygon shapefiles contain boundary data for a specific type of Census geography.  See the U.S. Census Bureau Geographic Terms and Concepts documentation for further explanation of Census geography (http://www.census.gov/geo/www/2010census/GTC_10.pdf).  
Below is a list of possible fields.  Attribution will vary depending on the type of geography.  Field names, descriptions and data types are listed in this format:  FIELD_NAME Description [data value or type].
AFFGEOID AFF Summary Level Code, nation identifier; nation FIPS code [string]; AFFGEOID10 2010 Census AFF Summary Level Code, nation identifier; nation FIPS code [string]; ALAND Current land area [number]; ALAND10 2010 Census land area [number]; CD113FP 113th congressional district FIPS code [string]; CDSESSN 113th congressional session code [string]; GEOID identifier, code [string]; GEOID10 2010 Census identifier, 2010 Census code [string]; LSAD Current name and the translated legal/statistical area description code [string]; LSAD10 2010 Census name and the translated legal/statistical area description code [string]; LSY Legislative session year [string]; NAME10 2010 Census name [string]; NAMELSAD Current name and the translated legal/statistical area description [string]; NAMELSAD10 2010 Census name and the translated legal/statistical area description [string]; SLDLST Current state legislative district lower chamber code [string]; SLDUST Current state legislative district upper chamber code [string]; STATEFP Current state FIPS code [string]; UACE10 2010 Census urban area code [string]; UATYP10 2010 Census urban area type [string].
The ALAND or ALAND10 field is the calculated area derived from the ungeneralized area of each entity in square miles.  This field can be used in density calculations.  Users should not calculate the area of the generalized polygons for use in any analysis.  Use the GEOID field to join these spatial tables to 2010 Census data tables if needed.  
Some nation-based files may include Puerto Rico and the Island Areas of the United States.  Island areas include American Samoa, Guam, the Commonwealth of the Northern Mariana Islands (Northern Mariana Islands), and the United States Virgin Islands.
                          
Entity and Attribute Detail Citation
                            http://www.census.gov/geo/www/2010census/GTC_10.pdf
                          

Distribution Information 

Distributor
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Department of Commerce, U.S. Census Bureau, Geography Division
Contact Address
Address Typemailing
Address4600 Silver Hill Road
CityWashington
State or ProvinceDC
Postal Code20233-7400
CountryUnited States

Contact Voice Telephone301.763.1128

Distribution Liability
                        No warranty, expressed or implied is made with regard to the accuracy of these data, and no liability is assumed by the U.S. Government in general or the U.S. Census Bureau in specific as to the spatial or attribute accuracy of the data.  The act of distribution shall not constitute any such warranty and no responsibility is assumed by the U.S. government in the use of these files.  The boundary information is for small-scale mapping purposes only; boundary depiction and designation for small-scale mapping purposes do not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.
                      
Standard Order Process
Digital Form
Digital Transfer Information
Format NameSHP (compressed)
File Decompression TechniqueThe files were compressed using Linux-based Info-ZIP Zip 2.32. Files can be decompressed with PK-ZIP, version 1.93A or higher, WinZip or other decompression software packages.

Digital Transfer Option
Online Option
Computer Contact Information
Network Address
Network Resource Namehttp://www.census.gov/geo/www/cob/index.html

FeesThe online cartographic boundary files may be downloaded without charge.


Technical Prerequisites
The cartographic boundary files contain geographic data only and do not include display or mapping software or statistical data. The files are delivered as zipped ESRI Shapefiles. Users are responsible for converting or translating the files into a format used by their specific software packages.


Metadata Reference 

Metadata Date2013-07
Metadata Contact
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Department of Commerce, U.S. Census Bureau, Geography Division/Cartographic Products Branch
Contact Address
Address Typemailing
Address4600 Silver Hill Road
CityWashington
State or ProvinceDC
Postal Code20233-7400
CountryUnited States

Contact Voice Telephone301.763.1101
Contact Facsimile Telephone301.763.4710
Contact Electronic Mail Addressgeo.geography@census.gov

Metadata Standard NameContent Standard for Digital Geospatial Metadata
Metadata Standard VersionFGDC-STD-001-1998