Federal Land Ownership

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Frequently-anticipated questions:

What does this data set describe?

Title: Federal Land Ownership
Abstract:
The NC Center for Geographic Information and Analysis, using US Geological Survey maps, developed the GIS data set, Federal Land Ownership, to delineate the boundaries of land in North Carolina that is owned and managed by the US Government. This file is updated as changes occur.
Supplemental_Information:
The portion of the Cape Hatteras National Seashore which lies on Roanoke Island was digitized from 1:24,000-scale USGS quads, which had the boundary outlined by the Refuge manager.
Revisions and updates to this layer include: 9.) April 2007: Update to this layer includes correction of acreage values.
8.) March 2006: Updates to this layer consist of boundary edits from Federal Managed Areas (DENR, Division of Parks and Recreation) data.
7.) April 2003: Updates to this layer consist of boundary edits from Federal Managed Areas (DENR, Division of Parks and Recreation) data.
6.) June 2000: Update to this layer consisted of adding .pat attribute data that was inadvertently not added with the May 17, 1995 boundary updates. Also, an acres item was added to the .pat, and the acres were calculated for each polygon.
5.) December 1998: Update to this layer consisted of projecting the data from NAD27 datum, State Plane projection, units of measure feet TO: NAD83 DATUM, State Plane PROJECTION, UNITS OF MEASURE METERS. This was done to comply with the NC Geographic Information Coordinating Council's "Statement of Direction for North Carolina Corporate Geographic Database Horizontal Reference, Datum and Unit of Measure". This reprojecting was done in various ways depending on the data type and content. Vector data was projected using the 'project' command in ESRI's Arc software and topology was cleaned and built based on coverage needs. Raster data was projected using ESRI's Grid module and various steps as applicable.
4.) January 1996: Update consisted of changing a label point in a polygon that was null to "Great Smoky Mountains National Park". This edit took place in Swain County. PRIOR TO THE 1/23/96 VERSION, THIS LAYER WAS NAME NC.FLO
3.) May 1995: Update consisted of several polygonal additions from three US Fish and Wildlife base maps. The changes occurred in the Roanoke River National Wildlife Refuge and the Currituck National Wildlife Refuge.
2.) November 1993: Update consisted of shifting the 1:250,000-scale federal land data to integrate it with 1:100,000-scale county boundaries. This coverage now corresponds to the USGS 1:100,000-scale county boundary files.
1.) February 1993: Layer was changed from nc.usfp to nc.flo. The 1988 update consisted of adding the Alligator River Wildlife Refuge boundaries from the Department of Transportation Highway maps. No previous versions were archived.
  1. How should this data set be cited?

    North Carolina Center for Geographic Information and Analysis, 20060329, Federal Land Ownership: North Carolina Center for Geographic Information and Analysis, Raleigh, North Carolina.

    Online Links:

    • www.nconemap.com

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.387003
    East_Bounding_Coordinate: -75.417851
    North_Bounding_Coordinate: 36.588809
    South_Bounding_Coordinate: 33.845487

  3. What does it look like?

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

    Beginning_Date: 1984
    Ending_Date: 24-Apr-2007
    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: _Method: Federal property name
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (1250)
      • GT-polygon composed of chains (1251)
      • Node, planar graph (1965)
      • Area point (1250)

    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 0.001870
      Ordinates (y-coordinates) are specified to the nearest 0.001870
      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.

  7. How does the data set describe geographic features?

    flo
    Boundaries of lands owned by the federal government as represented on USGS maps. (Source: US Geological Survey)

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

    Frequency of measurement: None planned

    Range of values
    Minimum:9.958
    Maximum:11726510.000
    Units:meters
    Resolution:0.001

    ACRES
    Acres per polygon (Source: Software computed)

    Frequency of measurement: As needed

    Range of values
    Minimum:0.000
    Maximum:150,118.609

    AGENCY
    Controlling US Land Management Agency name (Source: US Geological Survey)

    Frequency of measurement: As needed

    Agency names vary

    FLO_
    Internal identifier (Source: Software computed)

    Varies

    FLOMOD0306_ID
    Internal identifier (Source: Software computed)

    Varies

    AGENCY_
    Agency number (Source: US Geological Survey)

    Varies

    LMA_SITE
    Site Name (Source: US Geological Survey)

    Varies

    CO_
    County number (Source: US Geological Survey)

    Varies

    CO_NAME
    County Name (Source: US Geological Survey)

    Varies

    SHAPE
    Feature geometry. (Source: Software computed.)

    Coordinates defining the features.

    Entity_and_Attribute_Overview:
    A polygon coverage depicting Federally-owned lands in North Carolina.
    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?

    CGIA Director, Timothy R. Johnson Database Administration, David Giordano

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

    NC CGIA
    301 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred

Why was the data set created?

These data were created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 4)
    NC Center for Geographic Information and Analysis, 20070424, Federal Land Ownership: NC Center for Geographic Information and Analysis, Raleigh, North Carolina.

    Other_Citation_Details:
    Data is updated as needed. The base scales vary from 1:250000; 1:100000; and 1:24000
    Type_of_Source_Media: Paper
    Source_Contribution: Boundaries of federally-owned lands

    None (source 2 of 4)
    Survey, US Geological , 1938-1990, USGS 7.5 Minute series quadrangles: US Geological Survey, Reston, Virginia.

    Other_Citation_Details: Published map series
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 24000
    Source_Contribution:
    Paper maps used to delineate the boundaries of federally-owned lands

    None (source 3 of 4)
    Survey, US Geological , 1984-1986, USGS 30 x 60 series quadrangles: US Geological Survey, Reston, Virginia.

    Other_Citation_Details: Published map series
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 100000
    Source_Contribution:
    Paper maps used to delineate the boundaries of federally-owned lands

    None (source 4 of 4)
    Survey, US Geological , 1977, USGS series quadrangles: US Geological Survey, Reston, Virginia.

    Other_Citation_Details: Published map series
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Paper maps used to delineate the boundaries of federally-owned lands

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

    Date: 23-Jan-1996 (process 1 of 1)
    The boundaries of the federally-owned lands in North Carolina were delineated by cartographers on USGS 1:250,000-, 1:100,000-, or 1:24,000-scale topographic maps. The linework was digitized by NCCGIA then it was checked by light table review. Any necessary corrections were made and new check plots were run. Post processing involved edgematching and mapjoining across map borders to create the final statewide data set. USFS suplies CGIA with updates as they occur.

    Person who carried out this activity:

    NC CGIA
    301 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred
  3. What similar or related data should the user be aware of?

    NC Center for Geographic Information and Analysis, 1990, County Boundaries: NC Center for Geographic Information and Analysis, Raleigh, NC.

    Online Links:

    Other_Citation_Details: CGIA distributes this data

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

  1. How well have the observations been checked?

    The US Geological Survey delineated the boundaries on 1:250,000-, 1:100,000-, and 1:24,000-scale USGS topographic maps. NCCGIA digitized these boundaries and attributed them with codes supplied by the US Fish and Wildlife Service, including: controlling US land management agency, and FIPS. The digital files were plotted and overlayed to the originals and linework and label corrections were made.

  2. How accurate are the geographic locations?

    Federal land boundaries were marked on 1:250,000-, 1:100,000-, or 1:24,000-scale maps, all of which meet National Map Accuracy Standards, using a best estimate with reference to surrounding features. Boundaries drawn were digitized and check plots used to ensure correct boundary location, within a line width.

  3. How accurate are the heights or depths?

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

    These data represent the locations and identities of lands in North Carolina, which are owned and managed by the US Govern- ment as mapped by the US Geological Survey and the U.S. Fish and Wildlife Service.

  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 foot). Topo- logy 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 form this data set should cite the following: The source of the Federal Land Ownership data is the North Carolina Corporate Geographic Database. Earlier versions of this data set 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 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred
  2. What's the catalog number I need to order this data set?

    Federal Land Ownership

  3. What legal disclaimers am I supposed to read?

    NCCGIA is charged with the development and maintenance of the NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. 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 user must be aware of possible 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 without its current, comliant metadata record. 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 can be customized on a cost-recovery basis. Contact dataq@ncmail.net or 919-733-2090 for more information.

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

    All formats available from www.nconemap.com are in ESRI shapefile. Other formats are available on a cost-recovery basis - contact dataq@ncmail.net or 919.733.2090 for more information. Format compatibility is the user's responsibility.

Who wrote the metadata?

Dates:
Last modified: 24-Apr-2007
Metadata author:
North Carolina Center for Geographic Information and Analysis
c/o David Giordano
Database Administration
301 N. Wilmington Street, Suite 700
Raleigh, North Carolina 27601-2825
U.S.A.

(919) 733-2090 (voice)
(919)715-0725 (FAX)
dataq@ncmail.net

Hours_of_Service: 8am to 5pm
Contact_Instructions: Phone and electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.5 on Wed Aug 27 10:30:03 2008