GOA_Den

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?

Title: GOA_Den
Abstract:
International Pacific Halibut Commission (IPHC) statistical areas (stat areas) for California, Oregon, Washington, British Columbia (Canada) and Alaska.
Supplemental_Information:
(1) These digitized statistical areas are polygons. Most vertices coincide with the historical IPHC areas. For accurate digitization, additional vertices were inserted by referring to NOAA (National Oceanic and Atmospheric Administration) and CHS (Canadian Hydrographc Survey) Mercator projected charts. (2) Nodes (i.e. intermediate points between vertices) were computed using the ArcView 3.2 ReturnDensified method with a 500-meter step-size. (3) Statistical Area 450 crosses the 180 degree meridian and was therefore split into Eastern and Western hemisphere polygons, but is considered to be a single area. (5) Additional information concerning the IPHC statistical areas can be found in IPHC Technical Report No. 49 (ISBN: 0579-3920).
  1. How should this data set be cited?

    International Pacific Halibut Commission., November 01, 2004, GOA_Den.

    Online Links:

    • \\ALPINE\c\temp\2004_12_17\GOA_Den.shp

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -179.999999
    East_Bounding_Coordinate: 179.999999
    North_Bounding_Coordinate: 61.500000
    South_Bounding_Coordinate: 37.000000

  3. What does it look like?

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

    Calendar_Date: November 1, 2004
    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 (97)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.01. Longitudes are given to the nearest 0.01. Latitude and longitude values are specified in Decimal degrees.

      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?

    GOA_Den

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    STAT_AREA
    Name of the statistical area

    HEMI
    Hemisphere of the statistical area

    ValueDefinition
    EEastern hemisphere
    WWestern hemisphere

    STATUS
    Whether the statistical area is open, or closed to commercial fishing

    ValueDefinition
    Openstatistical area is open to commercial fishing
    Closedstatistical area is closed to commercial fishing

    TYPE
    Whether the statistical area is a GOA (Gulf of Alaska) or a Bering Sea (BS) statistical area

    ValueDefinition
    GOAGulf of Alaksa

    REGION
    Same as Reg_Area, but indicates the hemisphere, where appropriate.

    REG_AREA
    Regulatory Area in which the statistical area is located

    STAT_NUM
    A numeric version of Stat_Area

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?

    Richard Leickly did the GIS work; Thomas Kong supplied the vertices and provided supporting information.

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

    Thomas Kong
    International Pacific Halibut Commission
    Biologist
    P.O. Box 95009
    Seattle, Washington 98145-2009
    USA

    (206) 634-1838 ext. 232 (voice)
    Tom(AT)iphc.washington.edu

    Contact_Instructions: Email is the preferred contact method.

Why was the data set created?

The IPHC uses the statistical areas to aggregate commercial and research catch data.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Type_of_Source_Media: NOAA (USA) and CHS (Canada) Mercator projected nautical charts
    Source_Scale_Denominator: Many charts ranging from 200,000 to 1,000,000

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

  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?

    These data should be considered to be accurate to 0.01 degree.

  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: These shapefiles are freely available to the public.
Use_Constraints:
While defined and created in the Mercator projection, the addition of densely spaced intermediate points (at approximately 500-meter intervals), followed by unprojecting, allows the shapefiles to be used in any projection. These shapefiles have no legal or official status.

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

    International Pacific Halibut Commission

    (206) 634-1838 (voice)
    (206) 632-2983 (FAX)

  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: 17-Dec-2004
Metadata author:
Richard Leickly
International Pacific Halibut Commission
Scientific Programmer
P.O. Box 95009
Seattle, WA 98145-2009
USA

(206) 634-1838 ext. 221 (voice)
Richard(AT)iphc.washington.edu

Contact_Instructions: Email is the preferred contact method.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Fri Dec 17 14:20:10 2004