onemap_prod.SDEADMIN.ap24vahu_poly

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Frequently-anticipated questions:

What does this data set describe?

Title: onemap_prod.SDEADMIN.ap24vahu_poly
Abstract:
This data contains the hydrologic units boundaries for the 18 southeasternmost independent cities/counties in Virginia. This area is part of the Albemarle-Pamlico Estuarine Study (APES) area. Hydrologic units depict watershed areas. This data only covers the Virginia APES area. The APES area covers a large portion of the North Carolina coast, central and north-central NC and southeastern VA.
Supplemental_Information:
For cost/format/media information: <http://www.cgia.state.nc.us/cost.html> 
filename: ap24vahu  size= 0.7 mb

Revisions and updates to this layer include:
2.) filename: ap24vahu90  This data was compiled
around 1990 for use in the Albemarle Pamlico
Estuarine Study. Virginia portion only.
1.) filename: ap24hu90  This data was compiled
around 1990 for use in the Albemarle Pamlico
Estuarine Study. Virginia and NC areas, the NC
areas have been superceded by the NC hydrologic
unit data.
  1. How should this data set be cited?

    USDA, Natural Resources Conservation Service, 1990, onemap_prod.SDEADMIN.ap24vahu_poly: USDA, Natural Resources Conservation Service, Washington D.C..

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -78.904990
    East_Bounding_Coordinate: -75.835555
    North_Bounding_Coordinate: 37.398648
    South_Bounding_Coordinate: 36.502015

  3. What does it look like?

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

    Calendar_Date: 1990
    Currentness_Reference: Compilation period

  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 (170)

    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 0.000512
      Ordinates (y-coordinates) are specified to the nearest 0.000512
      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.ap24vahu_poly

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    onemap_prod.SDEADMIN.ap24vahu_poly.AREA

    PERIMETER

    AP24VAHU_

    AP24VAHU_ID

    A2VH_OY_AREA

    A2VH_OY_PERIMETE

    AP24VAHU_1

    AP24VAHU_I

    MAJOR1

    MINOR1

    MAJOR2

    MINOR2

    HU_

    USGS_

    ACRES

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE.area

    SHAPE.len

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?

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

    NC Center for Geographic Information and Analysis
    Production Services
    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: 8am to 5pm
    Contact_Instructions: Preferred contact is by email

Why was the data set created?

This data was collected as part of a study on the APE area. The APES area covers a large portion

How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 1)
    Metadata imported.

    Data sources used in this process:

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

  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?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

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

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

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 Hydrologic Units - Virginia data is the North Carolina Corporate Geographic Database (or the appropriate source). 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 contact information not provided.]

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

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 10:29:03 2008