onemap_prod.SDEADMIN.slcsha_poly

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Frequently-anticipated questions:

What does this data set describe?

Title: onemap_prod.SDEADMIN.slcsha_poly
Abstract:
The Office of State Planning, NC Center for Geographic Information and Analysis, with the aid of The Research Triangle Institute, created the GIS data set, Shoreline 1:24,000-scale, to be used as a template for the Closed Shellfish Harvesting Areas data layer. This layer depicts the coastal North Carolina shoreline, is a subset of the USGS linework from the 1:24,000-scale quadrangles, but is not a complete replication of the shoreline on those quadrangles.
Supplemental_Information:
This data layer was originally digitized at NC CGIA and placed into their 1:24,000-scale tile library. NC CGIA had the Research Triangle Institute (RTI) combine all shoreline tics to create one coverage. This coverage was sent back to NC CGIA, where edits were made to correct for dangles and edgematch problems. The final coverage was then used as a template for the Closed Shellfish Harvesting Areas data layer. 
system filename: slcsha24    approx. file size = 9.5 mb

Revisions and updates to this layer include:
3.) filename: slcsha241298  The 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.
2.)  filename: slcsha24994  (previously named nc24.csha91694 and
cgia24.sl994)  The September 16, 1994 update consisted
of the addition of shoreline to match the Closed Shellfish
Harvesting Areas data layer.
1.) filename: slcsha194  (previously named nc24.csha194 and
cgia24.sl194)   The January 1, 1994 version was the original
version of this data. This file was previously name cgia24.sl.
  1. How should this data set be cited?

    NC Office of State Planning, NC Center for Geographic Informati, 19981201, onemap_prod.SDEADMIN.slcsha_poly: NC Office of State Planning,NC Center for Geographic Information and Analysis, Raleigh, North Carolina.

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -78.978887
    East_Bounding_Coordinate: -74.671704
    North_Bounding_Coordinate: 36.684493
    South_Bounding_Coordinate: 33.758235

  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: _Method: None
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (3110)
      • GT-polygon composed of chains (3111)
      • Node, planar graph (6237)
      • Area point (3108)

    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 0.000588
      Ordinates (y-coordinates) are specified to the nearest 0.000588
      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.slcsha_poly
    1:24000 Scale Shoreline of North Carolina (Source: Office of State Planning, North Carolina Center for Geographic Information and Analysis)

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

    Frequency of measurement: None planned

    Range of values
    Minimum:2.106
    Maximum:7923480.500
    Units:meters
    Resolution:0.001

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    onemap_prod.SDEADMIN.slcsha_poly.AREA

    SLCSHA24_

    SLCSHA24_ID

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE.area

    SHAPE.len

    Shoreline
    1:24000 Scale Shoreline of North Carolina (Source: Office of State Planning, North Carolina Center for Geographic Information and Analysis)

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

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:6237

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

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:6237

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

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:3111

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

    Frequency of measurement: None planned

    Range of values
    Minimum:1
    Maximum:3110

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

    Frequency of measurement: As needed

    Range of values
    Minimum:0.327
    Maximum:1211058.250
    Units:meters
    Resolution:0.001

    slcsha24#
    Internal feature number (Source: Software computed)

    Frequency of measurement: As needed

    Range of values
    Minimum:1
    Maximum:6313

    slcsha24-ID
    Internal Identification Number (Source: User defined)

    Frequency of measurement: As needed

    Range of values
    Minimum:0
    Maximum:175

    Entity_and_Attribute_Overview:
    An arc and polygon coverage depicting coastal North Carolina shoreline as digitized from USGS 7.5 Minute series maps to be used as the template for the Closed Shellfish Harvesting Areas data layer. The polygon attribute table (PAT) has attribute data including total area in coverage units (square meters), total perimeter (linear meters), a polygon internal identification number, and a polygon user identification number. The items in the AAT also are all computer calculated. They include FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, slcsha24#, and slcsha24-ID. 
    SLCSHA24.PAT  Polygon Attribute Table
COLUMN  ITEM NAME    WIDTH OUTPUT TYPE  DEC  DESCRIPTION
1   AREA               4     12    F     3   Total area in meters
5   PERIMETER          4     12    F     3   Total perimeter in meters
9   slcsha24#          4      5    B     -   Poly internal id number
13  slcsha24-ID        4      5    B     -   Poly user id number
SLCSHA24.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           4     12    F     3   Length of linear feature in meters
21   slcsha24#        4      5    B     -   Internal id number
25   slcsha24-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?

    NC-CGIA Director, Karen Siderelis
Data Management, Zsolt Nagy
Data Distribution, Ken Shaffer
Project Manager, David Giordano
North Carolina Center for Geographic Information and Analysis
Governor's Office
Office of State Planning
301 North Wilmington Street, Suite 700
Raleigh, NC 27601-2825

Research Triangle Institute Staff, Ross Curry
Center for Environmental Measurements & Quality Assurance

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

    David Giordano
    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

Why was the data set created?

This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS), and to assist in the mapping of the Closed Shellfish Havesting Areas.

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 2)
    Office of State Planning, NC Center for Geographic Informati, 19940916, Shoreline 1:24,000-scale: Office of State Planning, NC Center for Geographic Information and Analysis, Raleigh, North Carolina.

    Other_Citation_Details: Data is updated as needed
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Digitization of shoreline

    None (source 2 of 2)
    Survey, US Geological , Unknown, 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 shoreline

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

    Date: 01-Jan-1994 (process 1 of 3)
    The Research Triangle Institute combined all shoreline tics to create one coverage. The compiled coverage was returned to CGIA.

    Person who carried out this activity:

    Research Triangle Institute
    c/o Ross Curry
    PO Box 12194
    Research Triangle Park, North Carolina 27709-2194
    U.S.A.

    (919) 541-6239 (voice)
    919-541-5985 (FAX)
    listen@rti.org

    Hours_of_Service: 8:00am to 5:00pm
    Contact_Instructions: Preferred contact is by mail or phone.
    Date: 16-Sep-1994 (process 2 of 3)
    NC CGIA digitized the shoreline from USGS 7.5 Minute series quadrangles. Checkplots were made and overlayed to the originals; linework and label corrections were made. Linework was checked for accuracy to within a pen-width of the original linework. The Research Triangle Institute then combined all shoreline tics to create one coverage and returned the file to CGIA for where edits were made to correct for dangles and edgematch problems. The attributes include only the "sacred items."

    Person who carried out this activity:

    David Giordano
    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 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\2\xml32.tmp

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

    NC DENR-Division of Environment, Environmental Health Services Section, Shellf, Unknown, Closed Shellfish Harvesting Areas: NC DENR-Division of Environmental Health, Environmental Health Services Section, Shellfish Sanitation Branch, Raleigh, North Carolina.

    Online Links:

    Other_Citation_Details: NC CGIA distributes this data set

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

  1. How well have the observations been checked?

    All attributes are default attributes computed by the GIS software.

  2. How accurate are the geographic locations?

    The shoreline was digitized from 7.5 Minute USGS paper topographic maps which meet National Map Accuracy Standards. The shoreline was digitized and check plots used to ensure correct line location, within a line width.

  3. How accurate are the heights or depths?

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

    This data layer consists of arc and polygon data depicting coastal North Carolina shoreline as digitized by NC CGIA for use with the Closed Shellfish Harvesting Areas data. While the data was digitized from the USGS 1:24,000-scale quadrangles, it is not a complete duplication of the shoreline depicted on those quadrangles.

  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 using the 'clean' command. 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 form this data set should cite the following: The source of the Shoreline 1:24,000-scale 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. NOTE: This layer is a subset of the shoreline found in the USGS 1:24,000- scale quads and does not represent exact replication of the quadrangle linework.

  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?

    Shoreline (1:24000)

  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:
North Carolina 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 10:31:41 2008