Wild and Scenic River in Alaska (River Centerlines)

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Frequently anticipated questions:


What does this data set describe?

Title: Wild and Scenic River in Alaska (River Centerlines)
Abstract:
This dataset contains the linear features of Wild and Scenic River (WSR) in Alaska. WSR data is based on USGS National Hydrology Dataset (NHD).
  1. How should this data set be cited?

    Bureau of Land Management, 20050224, Wild and Scenic River in Alaska (River Centerlines): Alaska HUC Units Alaska HUC Units, USGS, USGS Rolla, Missouri.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -160.323301
    East_Bounding_Coordinate: -141.012068
    North_Bounding_Coordinate: 65.902718
    South_Bounding_Coordinate: 62.521647

  3. What does it look like?

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

    Calendar_Date: 24-Feb-2005
    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):

      • Complete chain (911)

    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 0.0000001. Longitudes are given to the nearest 0.0000001. 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?

    NLCS_WSR_Linear
    Wild and Scenic River River Centerlines (Source: NLCS GIS Boundary Data Standards)

    objectid
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    fnode_
    Internal node number for the beginning of an arc (from-node). (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Sequential unique whole numbers that are automatically generated.

    tnode_
    Internal node number for the end of an arc (to-node). (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    lpoly_
    Internal node number for the left polygon. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    rpoly_
    Internal node number for the right polygon. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Sequential unique whole numbers that are automatically generated.

    length
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    wsrl_
    Internal feature number (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    wsrl_id
    User-defined feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    wsrl_def_feature
    Value refers to the natural, manmade, or mapping feature that represents the National Wild and Scenic River (WSR) boundary. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    blankNo source boundary features defined

    wsrl_coord_sourc
    Value refers to the actual source of the defining feature. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    USGS NHD DatasetRiver centerlines were taken from the USGS NHD Dataset

    wsrl_name
    Value refers to the official name of the Wild and Scenic River. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    Beaver CreekRiver name taken from the USGS NHD Dataset
    Birch Creek National Wild RiverRiver name taken from the USGS NHD Dataset
    Birch Creek- Not BLM LandRiver name taken from the USGS NHD Dataset
    Champion CreekRiver name taken from the USGS NHD Dataset
    Delta RiverRiver name taken from the USGS NHD Dataset
    Dennison ForkRiver name taken from the USGS NHD Dataset
    Fortymile RiverRiver name taken from the USGS NHD Dataset
    Franklin CreekRiver name taken from the USGS NHD Dataset
    Gulkana RiverRiver name taken from the USGS NHD Dataset
    Hutchinson CreekRiver name taken from the USGS NHD Dataset
    Joseph CreekRiver name taken from the USGS NHD Dataset
    Logging Cabin CreekRiver name taken from the USGS NHD Dataset
    Middle Fork Gulkana RiverRiver name taken from the USGS NHD Dataset
    Middle Fork North Fork Fortymile RiverRiver name taken from the USGS NHD Dataset
    Mosquito ForkRiver name taken from the USGS NHD Dataset
    Napoleon CreekRiver name taken from the USGS NHD Dataset
    North Fork Fortymile RiverRiver name taken from the USGS NHD Dataset
    O'Brien CreekRiver name taken from the USGS NHD Dataset
    South Fork Fortymile RiverRiver name taken from the USGS NHD Dataset
    Uhler CreekRiver name taken from the USGS NHD Dataset
    Unalakleet RiverRiver name taken from the USGS NHD Dataset
    Wade CreekRiver name taken from the USGS NHD Dataset
    Walker ForkRiver name taken from the USGS NHD Dataset
    West Fork Dennison ForkRiver name taken from the USGS NHD Dataset
    West Fork Gulkana RiverRiver name taken from the USGS NHD Dataset

    wsrl_state
    Value refers to the administrative state for the Wild and Scenic River. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    AKAlaska

    wsrl_wild
    Refers to the wild class as defined in the Wild and Scenic Rivers Act of 1968. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    0Not designated as wild
    1Designated as wild

    wsrl_scenic
    Refers to the scenic class as defined in the Wild and Scenic Rivers Act of 1968. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    0Not designated as scenic
    1Desginated as scenic

    wsrl_rec
    Refers to the recreational class as defined in the Wild and Scenic Rivers Act of 1968 (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    0Not designated as recreational.
    1Designated as recreational.

    wsrl_study
    Refers to the study class as defined in the Wild and Scenic Rivers Act of 1968. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    0Not desginated as study.
    1Desginated as study.

    wsrl_casefile
    Value refers to the serialized case file number for each National Wild and Scenic River. (Source: NLCS GIS Boundary Data Standards)

    ValueDefinition
    AKAA060766AKAA 060766
    AKAA060769AKAA 060769
    AKAA060770AKAA 060770
    AKFF086569AKFF 086569
    AKFF086628AKFF 086628
    AKFF086629AKFF 086629

    id
    row id (Source: Row ID)

    Sequential unique whole number automatically generated.

    shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.


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?

    Bureau of Land Management
    Attn: Holli McClain
    Outdoor Recreation Planner
    1150 University Ave.
    Fairbanks, AK 99709
    USA

    (907) 474-2378 (voice)
    (907) 474-2280 (FAX)
    holli_mcclain@blm.gov


Why was the data set created?

This dataset was created to depict the centerline of designated Wild and Scenic Rivers in Alaska as linear features.
Please consult BLM-Alaska's Land Information System for the Legal land Descriptions for each Wild and Scenic River.


How was the data set created?

  1. From what previous works were the data drawn?

    none (source 1 of 1)
    United States Geologic Survey (USGS), Unknown, National Hydrology Dataset (NHD): unknown unknown, United States Geologic Survey, United States Geologic Survey.

    Type_of_Source_Media: vector digital data
    Source_Scale_Denominator: 250,000
    Source_Contribution: USGS

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

    Date: 24-Feb-2005 (process 1 of 1)
    Stream centerlines clipped from USGS National Hydrographic Dataset where river or creek name in the following list:
    Beaver Creek Birch Creek National Wild River Birch Creek- Not BLM Land Champion Creek Delta River Dennison Fork Fortymile River Franklin Creek Gulkana River Hutchinson Creek Joseph Creek Logging Cabin Creek Middle Fork Gulkana River Middle Fork North Fork Fortymile River Mosquito Fork Napoleon Creek North Fork Fortymile River O'Brien Creek South Fork Fortymile River Uhler Creek Unalakleet River Wade Creek Walker Fork West Fork Dennison Fork West Fork Gulkana River
    Stream centerlines were then clipped from the WSR corridor polygons.
    Line topology built

    Person who carried out this activity:

    Tim Varner
    Bureau of Land Management
    IT Specialist
    222 W. 7th Ave. #13
    Anchorage, AK 99513
    USA

    (907) 271-5799 (voice)
    (907) 271-4549 (FAX)
    tvarner@blm.gov

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

    United States Geological Survey (USGS), Unknown, National Hydrology Dataset: Alaska NHD Alaska NHD, United States Geologic Survey, USGS.


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

  1. How well have the observations been checked?

    Wild and Scenic River (river centerline) attributes were verifed be comparing BLM Alaska Land Information System and Master Title Plats and USGS Digital Raster Graphic topographic maps.

  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?

    Stream centerlines were clipped from National Hydrographic Dataset and were reviewed against the Digital Raster Graphic topographic maps.

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

    Line topology exists


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Discretionary, contains no sensitive information - generally considered releasable.
Use_Constraints:
The scale of the data varies and generally, it is not recommended to use the data at a scale larger than 1:63,360. Depending on the source data, the parcels may not be recommended for use at a scale larger than 1:250,000.
Any hardcopies or published datasets using this data shall clearly indicate their source.
Any users wishing to modify this data are obligated to report the extent of their modifications. User specifically agrees not to misrepresent modifications to this data, as approved or endorsed by the BLM.

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

    Bureau of Land Management
    Attn: Holli Mcclain
    Outdoor Recreation Planner
    1150 uUiversity Ave.
    Fairbanks, AK 99709
    USA

    (907) 474-2378 (voice)
    (907) 474-2280 (FAX)
    holli_mcclain@blm.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 14-Jun-2007
Last Reviewed: 14-Jun-2007
To be reviewed: 11-Jul-2008
Metadata author:
Bureau of Land Management
Attn: Tim Varner
IT Specialist
222 W. 7th Ave. #13
Anchorage, AK 99513
USA

(907) 271-5799 (voice)
(907) 271-4559 (FAX)
tvarner@blm.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


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