onemap_prod.SDEADMIN.swlg

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Frequently-anticipated questions:

What does this data set describe?

Title: onemap_prod.SDEADMIN.swlg
Abstract:
In the late 1990s, the North Carolina Department of Environment and Natural Resources, Division of Water Quality developed a GIS data set representing point locations of intensive animal operations in North Carolina. In 2003, CGIA used digital ortho photography from 1998 to verify the DWQ points for swine operations and to identify additional swine lagoons and barns visible in the photos. The intention is to display patterns of swine operations for planning and impact analysis without including attributes of the operations. Matching points to DWQ permits, for example, would take more research and processing.
Supplemental_Information:
system filename : North Carolina swine lagoon locations file size = 0.5 MB The October 2003 file is the first version of this dataset.
  1. How should this data set be cited?

    CGIA, NC, 20031006, onemap_prod.SDEADMIN.swlg: NC DENR Division of Water Quality, Raleigh, North Carolina.

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.868864
    East_Bounding_Coordinate: -75.984500
    North_Bounding_Coordinate: 36.568590
    South_Bounding_Coordinate: 33.971190

  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: ground condition

  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: Facility name, stream name, and subbasin number
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Entity point (4148)

    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 0.001024
      Ordinates (y-coordinates) are specified to the nearest 0.001024
      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.swlg
    North Carolina swine lagoon locations (Source: NC DENR-Div of of Water Quality, Water Quality Section)

    COUNTY
    County name (Source: NC CGIA)

    variable

    Shape
    Feature geometry. (Source: ESRI)

    Frequency of measurement: As needed

    Coordinates defining the features.

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    COUNTY__
    County Number of county where facility is located (Source: NC CGIA)

    Frequency of measurement: As needed

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

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    Entity_and_Attribute_Overview:
    The only attributes provided are county number and county name. CGIA could not identify specific animal operations from orthophotos. The points are intended to display the pattern of operations and the approximate location in the context of other GIS data.
    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?

    This set is based in part on data from the NC Department of Environment and Natural Resources, Division of Water Quality, Water Quality Section 512 N. Salisbury Street, Raleigh, NC 27604-1148. CGIA verified and created point locations based on Digital Orthophoto Quarter Quads, 1998 images.

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

    NC Center for Geographic Information and Analysis
    20322 Mail Service Center
    Raleigh, North Carolina 27699-0322
    U.S.A.

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

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Preferred contact is by email or phone.

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?

    CGIA (source 1 of 1)
    NC Center for Geographic Information and Analysis, 20031006, North Carolina Swine Lagoons: NC DENR - Div. of Water Quality, Water Quality Section, Raleigh, North Carolina.

    Type_of_Source_Media: digital raster and vector data
    Source_Scale_Denominator: 24000
    Source_Contribution:
    CGIA verified lagoon locations based on orthophotos of 1-meter resolution.

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

    Date: 06-Oct-2003 (process 1 of 3)
    In March 2003, for selected counties, CGIA used 1998 color orthophotography (DOQQ, Color Infrared) to verify the location of the points representing animal operations. Swine operations typically consist of long rectangular metallic barns and rectangular waste lagoons, both of which are visible in the orthophotos (1-meter resolution). CGIA added a point for each swine lagoon location that could be verified from the orthophotography.
    As of August 6, 2003, the verified points had not been reviewed by the Division of Water Quality and attributes had not been updated. This method does not account for new operations after 1998-99 and cannot assure completeness or accuracy for operations existing before 1999.
    More information about animal operation permits is available from the Division of Water Quality, <http://h2o.enr.state.nc.us/ndpu/ndpuapps.html> CGIA updates the digital file as needed.

    Person who carried out this activity:

    Jeff Brown
    NC CGIA
    Project Manager
    20322 Mail Service Center
    Raleigh, North Carolina 27699-0322
    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 2 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\xml15.tmp

    (process 3 of 3)
    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?

    NC Division of Water Quality, 1999, Intensive Animal Operations.

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

  1. How well have the observations been checked?

    The NC DENR Water Quality Section provided the NC Center for Geographic Information and Analysis (CGIA) with a 1999 shape file of points representing registered animal operations for the State of North Carolina. The data were intended for planning purposes and were not verified or documented for GIS. In 2003, CGIA overlayed the point locations with orthophotos from 1998 to verify apparent lagoons in the photos. Points not within a few hundred feet of a lagoon were excluded. Additional points were added interactively to coincide with the center of apparent lagoons associated with apparent swine facilities. Accuracy rests in part on the judgments by the technician and the project manager in the process of identifying lagoons and adjacent swine barns. Some of the apparent lagoons and barns may have been operations involving other animals. Except for the county location, all other attributes from the original file were dropped becasuse of the lack of confidence in the actual nature and status of intensive animal operations associated with apparent lagoon locations.

  2. How accurate are the geographic locations?

    The point locations are in the approximate center of apparent lagoons visibile on orthophotos of 1-meter resolution. This exceeds National Mapping Standards.

  3. How accurate are the heights or depths?

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

    These point locations represent the approximate center of each apparent lagoon associated with swine operations as observed on digital orhthophoto quarter quads throughout North Carolina.

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

    Using ESRI's ARC/INFO Arcview software, a point shapefile was created.

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 North Carolina Swine Lagoon locations 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
    20322 Mail Service Center
    Raleigh, North Carolina 27699-0322
    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?

    Point locations of swine lagoons apparent in orthophotos from 1998.

  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 Windows PCs. 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
Last Reviewed: 10-Jun-2004
Metadata author:
North Carolina Center for Geographic Information and Analysis
c/o REQUIRED: The person responsible for the metadata information.
Database Management
20322 Mail Service Center
Raleigh, North Carolina 27699-0322
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 10:32:03 2008