onemap_prod.SDEADMIN.dnchou_poly

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Frequently-anticipated questions:


What does this data set describe?

Title: onemap_prod.SDEADMIN.dnchou_poly
Abstract:
The NC Center for Geographic Information and Analysis acquired the voting districts shapefiles for the state of North Carolina from the General Assembly/Information Systems Division. These data represent the boundaries of 2003 House districts in North Carolina, ratified Nov. 25, 2003. Each district is labeled with unique district identification number. The shapefiles were processed into ARC/INFO coverages and projected from Decimal Degrees to Stateplane NAD83 meters projection.
Supplemental_Information:
system filename : dnchou    file size = 0.46 mb

Revisions and updates to this layer include:
4) filename: dnchou04  meta - dnchou04.txt
The April 2004 version updated House districts
from the previous version.
3) filename: dnchou03  meta - dnchou03.txt
The February 2003 version updated House districts
from the previous version.
2) filename: dnchou02  meta - dnchou02.txt
The February 2002 version updated House districts
from the previous version.
1) filename: dnchou92798  meta - dnchou92798.txt
The July 1998 version was the first release of this
data.  Originally developed in late 1997, this data
was not ready for final release until 7/98.
  1. How should this data set be cited?

    General Assembly, Information Systems Division, 20040412, onemap_prod.SDEADMIN.dnchou_poly: General Assembly, Information Systems Division, Raleigh, North Carolina.

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.422077
    East_Bounding_Coordinate: -75.355286
    North_Bounding_Coordinate: 36.617348
    South_Bounding_Coordinate: 33.642148

  3. What does it look like?

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

    Calendar_Date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
    Currentness_Reference: Data creation and revision dates

  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: House districts
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (121)
      • GT-polygon composed of chains (122)
      • Node, planar graph (353)
      • Area point (121)

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

      Grid_Coordinate_System_Name: State Plane Coordinate System 1983
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 3200
      Lambert_Conformal_Conic:
      Standard_Parallel: 34.333333
      Standard_Parallel: 36.166667
      Longitude_of_Central_Meridian: -79.000000
      Latitude_of_Projection_Origin: 33.750000
      False_Easting: 609601.220000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.005599
      Ordinates (y-coordinates) are specified to the nearest 0.005599
      Planar coordinates are specified in meters

      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?

    onemap_prod.SDEADMIN.dnchou_poly
    North Carolina House voting districts (Source: General Assembly, Information Systems Division)

    DISTRICT
    District identification number (Source: General Assembly, Information Systems Division)

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:120

    SHAPE.len

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    HOUSE04_

    HOUSE04_ID

    PERIMETER
    Total perimeter in coverage units (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:650.821
    Maximum:2170819.000
    Units:Meters
    Resolution:0.001

    HUE4PLGN_AREA

    HUE4PLGN_PERIMET

    HOUSE04_1

    HOUSE04_ID_1

    COUNT_

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE.area

    onemap_prod.SDEADMIN.dnchou_poly.AREA

    Districts - North Carolina House, 2003
    North Carolina House voting districts (Source: General Assembly, Information Systems Division)

    FNODE#
    From-node identifier of linear feature (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:353

    TNODE#
    To-node identifier of linear feature (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:353

    LPOLY#
    Internal number of poly to left of arc (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:122

    RPOLY#
    Internal number of poly to right of arc (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:122

    LENGTH
    Length of arc in coverage units (Source: Software computed)

    Frequency of measurement: As needed

    Range of values
    Minimum:287.888
    Maximum:178417.453
    Units:meters
    Resolution:.001

    DNCHOU04#
    Internal feature number (Source: Software computed)

    Frequency of measurement: As needed

    Range of values
    Minimum:1
    Maximum:473

    DNCHOU04-ID
    Internal identification number (Source: User defined)

    Frequency of measurement: As needed

    Range of values
    Minimum:1
    Maximum:473

    Entity_and_Attribute_Overview:
    A polygon coverage depicting 2003 House voting districts classified by the Information Services Division of the General Assembly. The polygon attribute table (PAT) has attribute data including the polygon internal identification number, the polygon user identification number, the identification number of each House district, and the number of census blocks in each district. There are no look up tables, annotation or cartosets for these data.
    DNCHOU92.PAT  Polygon Attribute Table
    COLUMN ITEM NAME  WIDTH OUTPUT TYPE DEC DESCRIPTION
    1      AREA          8     18     F    5   Total area in meters
    5      PERIMETER     8     18     F    5   Total perimeter in meters
    17     DNCHOU04#     4      5     B    -   Poly internal id number
    13     DNCHOU04-ID   4      5     B    -   Poly user id number
    17     DISTRICT      2      3     B    -   District id number
    21     COUNT         8     15     F    0   Number of census blocks
    
    DNCHOU92.AAT  Arc Attribute Table
    COLUMN ITEM NAME  WIDTH OUTPUT TYPE DEC DESCRIPTION
    1      FNODE#        4      5     B    -   From-node id of linear feature
    5      TNODE#        4      5     B    -   To-node id of linear feature
    9      LPOLY#        4      5     B    -   Left-side polygon id of linear feature
    13     RPOLY#        4      5     B    -   Right-side polygon id of linear feature
    17     LENGTH        8     18     F    5   Length of linear feature in meters
    21     DNCHOU04#     4      5     B    -   Internal id number
    25     DNCHOU04-ID   4      5     B    -   Internal id number
    
    Entity_and_Attribute_Detail_Citation: none


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?

    Information Systems Division Director
    Information Systems Division Staff, Dan Frey
    General Assembly, Information Systems Division
    300 N. Salisbury Street, Suite 400
    Raleigh, NC 27603
    
    NCCGIA Director, Tim Johnson
    Database Administration, Zsolt Nagy
    Acting Database Management, David Giordano
    Project Manager, Cheryl Pearce
    North Carolina Center for Geographic Information and Analysis
    NCDENR
    Division of Land Resources
    301 North Wilmington Street, Suite 700
    Raleigh, NC 27601-2825
    

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

    Dan Frey
    General Assembly, Information Systems Division
    300 N. Salisbury Street, Suite 400
    Raleigh, North Carolina 27603
    U.S.A.

    (919) 733-6834 (voice)
    (919) 715-7586 (FAX)
    danf@ncleg.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Preferred contact is by mail or telephone.


Why was the data set created?

These data were created to display the boundaries of voting districts, and to enable users to display voting districts with other geographic features.


How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 2)
    General Assembly, Information Systems Division, 20040412, House districts shapefiles: General Assembly, Information Systems Division, Raleigh, North Carolina.

    Other_Citation_Details: Data are updated as needed
    Type_of_Source_Media: Text
    Source_Contribution: House districts shapefiles

    None (source 2 of 2)
    NC Center for Geographic Information and Analysis, 20040412, Districts - North Carolina House, 2003: NC Center for Geographic Information and Analysis, Raleigh, North Carolina.

    Other_Citation_Details: CGIA distributes the data
    Type_of_Source_Media: shapefiles
    Source_Contribution:
    Shapefiles converted to ARC/INFO coverages and projected to Stateplane NAD83 meters projection

  2. How were the data generated, processed, and modified?

    Date: 18-Apr-2004 (process 1 of 4)
    Acquire shapefiles from General Assembly, Information Systems Division.

    Person who carried out this activity:

    Dan Frey
    General Assembly, Information Systems Division
    GIS Programmer/Analyst
    300 N. Salisbury Street, Suite 400
    Raleigh, North Carolina 27603
    U.S.A.

    (919) 733-6834 (voice)
    (919) 715-7586 (FAX)
    danf@ncleg.net

    Hours_of_Service: 8 am to 5 pm
    Contact_Instructions: Phone or electronic mail
    Date: 12-Apr-2004 (process 2 of 4)
    Process shapefiles into an ARC/INFO coverage. Project coverage to Stateplane NAD83 meters projection to produce a statewide House districts file.

    Person who carried out this activity:

    Jeff Brown
    NCCGIA
    GIS Analyst
    301 North Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919) 715-0725 (FAX)
    dataq@cgia.state.nc.us

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
    (process 3 of 4)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\xml4A1.tmp

    (process 4 of 4)
    Dataset copied.

    Data sources used in this process:

    • Server=cgiatdb; Service=5151; Database=onemap_test; User=sdeadmin; Version=sde.DEFAULT

  3. What similar or related data should the user be aware of?


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

  1. How well have the observations been checked?

    House districts shapefiles were acquired from the General Assembly, Information Systems Division, ratified Nov. 25, 2003. The shapefiles were converted to ARC/INFO coverages, cleaned with a dangle and fuzzy tolerance of .0001 and projected from Decimal Degrees projection to Stateplane NAD83 meters projection, resulting in a statewide districts coverage.

  2. How accurate are the geographic locations?

    No positional changes were made by NC CGIA.

  3. How accurate are the heights or depths?

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

    These data represent the boundaries of 2003 House districts in North Carolina. Each district is labeled with unique district identification number as supplied by the General Assembly, Information Systems Division data.

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

    Using ESRI's ARC/INFO GIS software, the dataset was built for arc and polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of 1 meter. Topology has not been edited since the last build or clean.


How can someone get a copy of the data set?

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

Access_Constraints: None
Use_Constraints:
Acknowledgement of products derived from this data set should cite the following: The source of the 2003 House voting districts data is the North Carolina Corporate Geographic Database. Earlier versions of this dataset may exist. The user must be sure to use the appropriate data set for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.

  1. Who distributes the data set? (Distributor 1 of 1)

    NC Center for Geographic Information and Analysis
    Production Services
    301 North Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    USA

    (919) 733-2090 (voice)
    (919) 715-0725 (FAX)
    dataq@cgia.state.nc.us

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions:
    Phone and electronic mail preferred For current price information use a web browser: COST INFORMATION - <http://www.cgia.state.nc.us/cost.html>
  2. What's the catalog number I need to order this data set?

    Districts - North Carolina House, 2003

  3. What legal disclaimers am I supposed to read?

    NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government.

  4. How can I download or order the data?

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

    Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.

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

    All formats supplied are created using ARC/INFO GIS software on Unix workstations. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: FORMAT/MEDIA INFORMATION - <http://www.cgia.state.nc.us/cost.html>


Who wrote the metadata?

Dates:
Last modified: 02-Oct-2006
Metadata author:
NC Center for Geographic Information and Analysis
c/o REQUIRED: The person responsible for the metadata information.
Database Management
301 North Wilmington Street, Suite 700
Raleigh, North Carolina 27601-2825
USA

(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us

Hours_of_Service: 8:30AM - 5:30PM
Contact_Instructions: Phone and electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.5 on Wed Aug 27 10:29:45 2008