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Connecticut US Congress Districts

Frequently-asked questions:


What does this data set describe?

Title:
Connecticut US Congress Districts

Abstract:
Connecticut US Congress Districts is a 1:100,000-scale, polygon feature-based layer that defines the Reapportionment of US Congressional District boundaries as reflected in the 2011Plan of Congressional Districting  for the State of Connecticut. Attribute information is comprised of codes that identify individual U.S Congressional Districts.

Supplemental information:
For additional information, contact the Connecticut General Assembly or the Connecticut Secreatary of State.

  1. How should this data set be cited?

    State of Connecticut, Department of Energy and Environmental Protection (data publisher), State of Connecticut, Connecticut General Assembly (data compiler, editor and publisher), 20130111, Connecticut US Congress Districts: State of Connecticut, Department of Energy and Environmental Protection, Hartford, Connecticut, USA.

    Online links:
  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -73.742161
    East: -71.781124
    North: 42.052598
    South: 40.950009

  3. What does it look like?

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/uscongressdstricts.gif (GIF)
    Full view of Connecticut US Congressional Districts

  4. Does the data set describe conditions during a particular time period?

    Calendar date: 20120219
    Currentness reference:
    US Congress Redistricting Plan date

  5. What is the general form of this data set?

    Geospatial data presentation form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect spatial reference:
      Connecticut US Congressional district numbers

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (5)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Lambert Conformal Conic
      Standard parallel: 41.200000
      Standard parallel: 41.866667
      Longitude of central meridian: -72.750000
      Latitude of projection origin: 40.833333
      False easting: 999999.999996
      False northing: 499999.999998

      Planar coordinates are encoded using coordinate pair.
      Abscissae (x-coordinates) are specified to the nearest 0.000250.
      Ordinates (y-coordinates) are specified to the nearest 0.000250.
      Planar coordinates are specified in survey feet.

      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.

      Vertical coordinate system definition:
      Altitude system definition:
      Altitude resolution: 1.000000
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    Connecticut US Congress Districts
    US Congressional Districts for Connecticut represented as polygon features. (Source: State of Connecticut, Connecticut General Assembly)

    OBJECTID
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    DISTRICT
    US Congressional District (Source: State of Connecticut, Connecticut General Assembly)
                      

    Text value ranging from 1 to 5.

    NDISTRICT
    US Congressional District Number (Source: State of Connecticut, Connecticut General Assembly)
                      

    Numeric value ranging from 1 to 5.

    SHAPE.area
    SHAPE.len
    Entity and attribute overview:
    The US Congressional District Number ranges from 1 to 5, uniquely identifies each district, and is stored as both text and numeric attribute values in the DISTRICT and NDISTRICT fields, respectively.

    Entity and attribute detail citation:
    State of Connecticut, Connecticut General Assembly (data compiler, editor and publisher)
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Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)


  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    GIS Section
    State of Connecticut, Department of Energy and Environmental Protection
    79 Elm Street
    Hartford, Connecticut 06106-5127
    USA

    860-424-3540 (voice)
    860-424-4058 (FAX)
    deep.gisdata@ct.gov
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
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Why was the data set created?

Connecticut US Congress Districts Districts is not intended for maps printed at map scales greater or more detailed than 1:100,000 scale (1 inch = 1.578 mile).

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How was the data set created?

  1. Where did the data come from?

    Source 1 - Specila Master Draft Plan.shp (source 1 of 3)

    State of Connecticut, Connecticut General Assembly (data compiler, editor and publisher), 20120119, Special Master's Draft Report & Congressional District Plan: State of Connecticut, Connecticut General Assebly, Hartford, Connecticut.

    Online links:
    Other citation details:
    Adopted by the Connecticut Supreme Court February 10, 1012. Available form the Connecticut Secretary of the State.

    Type of source media: online
    Source scale denominator: 100000
    Source contribution:
    This data source is a shapefile named Special Master Draft Plan.shp with district boundaries defined in Geographic Coordinates (latitute and longitude), North American Datum of 1983 (NAD83). It was downloaded from the Connecticut State Assembly website.

    Source 2 - US_Congress_Districts.shp (source 2 of 3)

    State of Connecticut, Department of Environmental Protection (data publisher), State of Connecticut, Connecticut General Assembly (data compiler, editor and publisher), 20010101, Connecticut US Congress Districts: State of Connecticut, Department of Environmental Protection, Hartford, Connecticut.

    Online links:
    Type of source media: disc
    Source scale denominator: 100000
    Source contribution:
    This data source is a shapefile named US_Congress_Districts.shp with district boundaries defined in the Connecticut State Plane Coordinate System, NAD83. Map units are in feet.

    Source 3 - US_Congress_Districts (source 3 of 3)

    State of Connecticut, Department of Energy and Environmental Protection (data publisher), State of Connecticut, Connecticut General Assembly (data compiler, editor and publisher), 20120111, Connecticut US Congress Districts: State of Connecticut, Department of Energy and Environmental Protection, Hartford, Connecticut, USA.

    Online links:
    Type of source media: disc
    Source scale denominator: 100000
    Source contribution:
    US_Congress_Disctricts is in GeoDatabase Feature Class format.

  2. What changes have been made?

    Date: 2013 (change 1 of 2)
    Datum conversion - Using ArcGIS software, the shapefile named Special Master Draft Plan.shp, having a file date of January 12, 2012, was converted from geographic coordinates to the Connecticut State Plane Coordinate System of 1983 (NAD83) to create shapefile named US_Congress_Districts.shp.

    Person responsible for change:
    GIS Section
    State of Connecticut, Department of Energy and Environmental Protection
    79 Elm Street
    Hartford, Connecticut 06106
    USA

    860-424-3540 (voice)
    deep.gisdata@ct.gov

    Data sources used in this process:
    • Source 1 - Special Master Draft Plan.shp

    Data sources produced in this process:
    • Source 2 - US_Congress_Districts.shp

    Date: 2013 (change 2 of 2)
    Convert to GeoDatabase Feature Class format - Defined new Feature Class named US_Congress_Districts and imported the attribute definitions, loaded features and imported metadata from US_Congress_Districts.shp shapefile. 
    
    Spatial Reference Properties for Feature Class:
    
    Coordinate System: NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet
    XY Domain MinX: 100000; MaxX: 2247483.645
    XY Domain MinY: 200000; MaxY: 2347483.645
    Precision: 1000

    Person responsible for change:
    GIS Section
    State of Connecticut, Department of Energy and Environmental Protection
    79 Elm Street
    Hartford, Connecticut 06106
    USA

    860-424-3540 (voice)
    deep.gisdata@ct.gov

    Data sources used in this process:
    • Source 2 - US_Congress_Districts.shp

    Data sources produced in this process:
    • Source 3 - US_Congress_Districts

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How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    All attributes have valid values. 

  2. How accurate are the geographic locations?

    The horizontal positional accuracy of this data is unknown.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    The data is complete and reflects the 2011 US Congressional District boundaries for the State of Connecticut at 1:100,000 scale.

  5. How consistent are the relationships among the observations, including topology?

    Polygon features conform to the following topological rules. Polygons are single part. There are no duplicate polygons. Polygons do not self overlap. Polygons do not overlap other polygons. It is not known whether automated procedures or other software tests or topology rules were performed to guarantee desired topology other than visual inspection.

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How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access constraints: None. The data is in the public domain and may be redistributed.
Use constraints:
No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:100,000 scale (1 inch =  1.578 mile). Although this data set  has been used by the State of Connecticut, Department of Energy and Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Energy and Environmental Protection as to the accuracy of the data and or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Energy and Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Connecticut General Assembly and the Department of Energy and Environmental Protection as the source for this information. For example, include the following data source description when printing this layer on a map: US Congressional Districts - From the US Congress Districts layer, compiled and published by the CT General Assembly and CT DEEP. Source map scale is 1:100,000.

Distributor 1 of 1

  1. Who distributes the data set?

    State of Connecticut, Department of Energy and Enviromental Protection
    79 Elm Street
    Hartford, Connecticut 06106-5127
    USA

    860-424-3540 (voice)
    860-424-4058 (FAX)
    deep.gisdata@ct.gov
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

  2. What's the catalog number I need to order this data set?

    Connecticut US Congress Districts

  3. What legal disclaimers am I supposed to read?

    Although this data set  has been used by the State of Connecticut, Department of Energy and Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Energy and Environmental Protection as to the accuracy of the data and or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata.

  4. How can I download or order the data?

    • Availability in digital form:


    • Data format:
      in format Shapefile, Feature Class (version ArcGIS)
      Network links:http://www.ct.gov/deep

    • Cost to order the data: An online copy of the data may be accessed without charge.


  5. Is there some other way to get the data?

    The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.

  6. What hardware or software do I need in order to use the data set?

    Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.

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Who wrote the metadata?

Dates:
Last modified: 20130729

Metadata author:
Howie Sternberg
State of Connecticut, Department of Energy and Environmental Protection
79 Elm Street
Hartford, Connecticut 06106-5127
USA

860-424-3540 (voice)
860-424-4058 (FAX)
deep.gisdata@ct.gov
Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata(FGDC-STD-001-1998)

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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