onemap_prod.SDEADMIN.twnshps

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Frequently-anticipated questions:

What does this data set describe?

Title: onemap_prod.SDEADMIN.twnshps
Abstract:
This set of boundaries represent Township Boundaries and other Minor Civil Divisions as released by the US Bureau of the Census as cartographic boundary files based on Census 2000 geography. Statistical data are not joined to these boundaries.
Supplemental_Information:
These are cartographic boundary files, not at the same scale as TIGER/Line 2000 boundaries. Minor civil divisions (MCDs) are the primary governmental or administrative divisions of a county or county equivalent in many states. MCDs represent many different kinds of legal entities with a wide variety of governmental and/or administrative functions. MCDs are variously designated as American Indian reservations, assessment districts, boroughs, charter townships, election districts, election precincts, gores, grants, locations, magisterial districts, parish governing authority districts, plantations, precincts, purchases, road districts, supervisor's districts, towns, and townships. In some states, all or some incorporated places are not located in any MCD (independent places) and thus serve as MCDs in their own right. In other states, incorporated places are part of the MCDs in which they are located (dependent places), or the pattern is mixed- some incorporated places are independent of MCDs and others are included within one or more MCDs. Independent cities, which are statistically equivalent to a county, also are treated as a separate MCD equivalent in states containing MCDs. In Maine and New York, there are American Indian reservations and off-reservation trust lands that serve as MCD equivalents; a separate MCD is created in each case where the American Indian area crosses a county boundary.
  1. How should this data set be cited?

    CGIA, NC, 20020416, onemap_prod.SDEADMIN.twnshps.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.422155
    East_Bounding_Coordinate: -75.415823
    North_Bounding_Coordinate: 36.617232
    South_Bounding_Coordinate: 33.733391

  3. What does it look like?

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

    Calendar_Date: 2001
    Currentness_Reference: publication 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?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (1145)

    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 0.002048
      Ordinates (y-coordinates) are specified to the nearest 0.002048
      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.twnshps
    Townships and other Minor Civil Divisions in North Carolina, Census 2000 (Source: NC CGIA)

    LSAD_TRANS
    Legal Statistical Area Description type (Source: US Bureau of the Census)

    Type varies.

    SHAPE.len

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    PERIMETER
    Perimeter of the polygon (Source: CGIA)

    Perimeter varies

    CS37_D00_
    Internal id (Source: CGIA)

    Sequential identifier

    CS37_D00_I
    Internal ID (Source: CGIA)

    Sequential identifier

    STATE
    State Number (Source: CGIA)

    Formal codeset
    Codeset Name:FIPS State Codes
    Codeset Source:US Bureau of the Census

    COUNTY
    County code (Source: US Bureau of the Census)

    Formal codeset
    Codeset Name:FIPS County Codes
    Codeset Source:US Bureau of the Census

    MCD
    Minor Civil Division Code (Source: US Bureau of the Census)

    Formal codeset
    Codeset Name:FIPS MCD Codes
    Codeset Source:US Bureau of the Census

    COUSUBFP
    Census subareas are statistical subdivisions of boroughs, census areas, city and boroughs, and the municipality (entities that are statistically equivalent to counties) in Alaska. Census subareas are delineated cooperatively by the state of Alaska and the U.S. Census Bureau. They were first used for data presentation purposes as part of the 1980 census (Source: US Bureau of the Census)

    Number varies

    NAME
    Name of subdivision (Source: US Bureau of the Census)

    Name varies.

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    LSAD
    Legal Statistical Area Description Code (Source: US Bureau of the Census)

    Formal codeset
    Codeset Name:LSAD Codes
    Codeset Source:US Bureau of the Census

    SHAPE.area

    onemap_prod.SDEADMIN.twnshps.AREA

    Entity_and_Attribute_Overview:
    Attributes represent names, types, and identification codes for minor civil divisions.
    Entity_and_Attribute_Detail_Citation: US Bureau of the Census

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?

    US Bureau of the Census, Census 2000. U.S. Census Bureau, Geography Division, Cartographic Operations Branch North Carolina Center for Geographic Information and Analysis

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

    NC CGIA
    Database Administrator
    20322 Mail Service Center
    Raleigh, NC 27699-0322
    USA

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

    Hours_of_Service: 9:00 to 5:00

Why was the data set created?

The purpose of this data set is to provide approximate township boundaries and other minor civil divisions as a context for other GIS themes and as a reference for statistical data from Census 2000.

How was the data set created?

  1. From what previous works were the data drawn?

    Census 2000 (source 1 of 1)
    US Bureau of the Census, Geography Division, Cartographic Operatio, 2001, Minor Civil Division Boundary File for North Carolina.

    Online Links:

    • www.census.gov

    Type_of_Source_Media: online
    Source_Scale_Denominator: 500000
    Source_Contribution: Preparation of cartographic boundary file.

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

    Date: 2001 (process 1 of 4)
    The cartographic boundary files are a generalized extract from the U.S. Census Bureau's TIGER database. Line simplification/smoothing was performed with a tolerance of 0.005 decimal degrees and a coordinate reduction using the Douglas-Peucker method with a tolerance of 0.0003 decimal degrees. Very small polygons were eliminated when the combination of geographic codes existed elsewhere. The geography was clipped back to the shoreline of the United States, in contrast to TIGER/LineŽ which shows the full extent of geography out to the 3-mile limit.

    Person who carried out this activity:

    US Bureau of the Census, Geography Division, Cartographic Operations Branch
    4700 Silver Hill Road
    Washington, DC 20233-0001
    USA

    301-763-4636 (voice)
    techsup@usgs.gov

    Data sources used in this process:
    • US Bureau of the Census

    Date: 25-Jun-2004 (process 2 of 4)
    Downloaded shapefile. Projected to State Plane Coordinates, NAD 1983 meters. Created metadata record.

    Person who carried out this activity:

    NC CGIA
    c/o Jeffrey Brown
    Project Manager
    20322 Mail Service Center
    Raleigh, NC 27699-0322
    USA

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

    Hours_of_Service: 9:00 to 5:00
    Data sources used in this process:
    • NC CGIA

    (process 3 of 4)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\xml1A.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?

    CGIA, NC, 20020416, Minor Civil Division Cartographic Boundary File.

    Other_Citation_Details:
    Minor Civil Divisions of Counties as defined by the US Bureau of the Census. Most MCDs in North Carolina are Townships.

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

  1. How well have the observations been checked?

    Accuracy of the boundaries and township names have not been verified.

  2. How accurate are the geographic locations?

    Boundaries are less accurate than TIGER/Line 2000 boundaries. The cartographic boundary files are primarily designed for small scale, thematic mapping applications at a target scale range of 1:500,000 to 1:5,000,000.

  3. How accurate are the heights or depths?

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

    The data cover all of North Carolina

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

    Data were downloaded from www.census.gov as a cartographic boundary file in shapefile format.

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:
Because of coordinate thinning: Cartographic boundary files should not be used for geocoding; Some offshore, redundant, zero population and housing land areas may be absent from the files; Cartographic Boundary files are not necessarily vertically integrated with previous boundary file sets.

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

    CGIA
    Database Administrator
    20322 Mail Service Center
    Raleigh, NC 27699-0322
    USA

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

    Hours_of_Service: 9:00 to 5:00
  2. What's the catalog number I need to order this data set?

    Shapefile of Township and other Minor Civil Divisions Boundaries in North Carolina.

  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 these 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 are 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 or ArcGIS on Windows PCs. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: <http://www.cgia.state.nc.us/cost.html>

Who wrote the metadata?

Dates:
Last modified: 02-Oct-2006
Last Reviewed: 17-Jun-2004
Metadata author:
NC CGIA
c/o Database Administrator
Database Administrator
20322 Mail Service Center
Raleigh, NC 27699-0322
USA

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

Hours_of_Service: 9:00 to 5:00
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 10:32:09 2008