Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska - vectorized topographic dataset

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Frequently-anticipated questions:


What does this data set describe?

Title:
Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska - vectorized topographic dataset
Abstract:
This dataset is comprised of a vector topographic dataset illustrating the Dalton Highway area, from Atigun Gorge to Slope Mountain, in the west-central Philip Smith Mountains 1:250,000 quadrangle. The dataset was obtained from the USGS Alaskan 15-minute quadrangle series maps: Phillip Smith Mountains B-4, B-5, C-4, C-5, D-4, and D-5.
Supplemental_Information:
The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Layers include:
grid_poly     township and range grid
hydro_arc     line coverage of depicting hydrologic features
hydro_poly     polygon coverage of depicting hydrologic features
hypso_arc     line coverage of depicting hypsographic contour lines
spots_point     point coverage of depicting hypsographic elevation point
trans_arc     line coverage of depicting transportation features
  1. How should this data set be cited?

    Staff, DGGS, 2002, Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska - vectorized topographic dataset: Preliminary Investigative Report PIR 2002-2, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), Fairbanks, AK, USA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -150.000000
    East_Bounding_Coordinate: -149.000000
    North_Bounding_Coordinate: 68.779444
    South_Bounding_Coordinate: 68.439167

  3. What does it look like?

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

    Beginning_Date: 2002
    Ending_Date: 2002
    Currentness_Reference: June 2002 (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?

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: 147.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000128
      Ordinates (y-coordinates) are specified to the nearest 0.000128
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6,378,206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    grid_poly table
    Object type is vector, there are 1,116 rows associated with this entity. The entity values refer to the United States Public Land Survey (USPLS) Township and Range grid. (Source: Titan Systems Corporation/AverStar Group)

    SECTION
    grid section identifier (Source: Attribute values were assigned by Alaska Division of Geological & Geophysical Surveys based on the United States Public Land Survey (USPLS) classification scheme.)

    Range of values
    Minimum:1
    Maximum:36

    hydro_arc table
    Object type is vector, there are 5,701 rows associated with this entity. The entity values refer to the location and boundaries of hydrologic features such as streams, rivers, ponds, and lakes. All attribute fields in this table contain auto generated values. (Source: Titan Systems Corporation/AverStar Group)

    hydro_poly table
    Object type is vector, there are 2,044 rows associated with this entity. The entity objects outline boundaries of water bodies that are representable at a 1:63,360 scale as enclosed polygons. Examples include large ponds, lakes, and major rivers. These objects were pragmatically derived from the hydro_arc data table. As a result, river-channel islands and similar enclosed land bodies occur as distinct polygons. (Source: Titan Systems Corporation/AverStar Group)

    WATER
    Values in this field differentiate land and water bodies. (Source: Attribute values assigned by Alaska Division of Geological & Geophysical Surveys based on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps.)

    ValueDefinition
    nullpolygon is a water body
    nonpolygon is a landmass

    hypso_arc table
    Object type is vector, there are 4,752 rows associated with this entity. The entity values refer to lines connecting points of equal elevation. (Source: Titan Systems Corporation/AverStar Group)

    ELEVATION
    elevation values of hypsographic contour lines as displayed on the United States Geological Survey Philip Smith Mountains (B-4), (C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps Attribute_Definition_Source: Attribute values assigned were by Alaska Division of Geological & Geophysical Surveys based on contour interval labels displayed on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps. (Source: NEED SOURCE HERE)

    ValueDefinition
    0corresponds to unlabeled hypsographic contour lines or to hypsographic contour lines that exist outside of the geologic map area

    Range of values
    Minimum:1,500
    Maximum:7,500
    Units:feet

    spots_point table
    Object type is point, there are 262 rows associated with this entity. The entity points correspond to locations of benchmark, spot, or lake elevation values. (Source: Titan Systems Corporation/AverStar Group)

    DATA
    differentiates lake, benchmark, and spot elevation points (Source: Attribute values were assigned by Alaska Division of Geological & Geophysical Surveys based on elevation labels displayed on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps.)

    ValueDefinition
    pointspot elevation data point
    lakelake elevation data point
    benchbenchmark elevation data point

    ELEVATION
    elevation value of a data point (Source: Attribute values were assigned by Alaska Division of Geological & Geophysical Surveys based on elevation labels displayed on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps.)

    ValueDefinition
    0corresponds to unlabeled data points that are either erroneous or that exist outside of the geologic map area

    Range of values
    Minimum:1,443
    Maximum:7,124
    Units:feet

    Name
    label text associated with a few of the benchmark data points (Source: Attribute values were assigned by Alaska Division of Geological & Geophysical Surveys based on labels displayed on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps.)

    Three of these data points exist within the geologically mapped area, their values are “Gal”, “Knit”, and “Lake”.

    trans_arc table
    Object type is vector, there are 98 rows associated with this entity. The entity objects correspond to transportation features. (Source: Titan Systems Corporation/AverStar Group)

    TYPE
    differentiates transportation feature types (Source: Attribute values were assigned by Alaska Division of Geological & Geophysical Surveys based on transportation features displayed on the United States Geological Survey Philip Smith Mountains (B-4),(C-4), (D-4), (B-5), (C-5), and (D-5) 1:63,360 quadrangle maps.)

    Values in this field are self explanatory text terms that describe each feature.


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?

    Funding for the geologic mapping and geochronologic dating performed for this project was provided by the U.S. Geological Survey STATEMAP Program under award number 03HQAG0055 and by the Alaska State Legislature. Project management by E.E. Harris. Digital attributing and metadata by: Simone Montayne and Paige Peaples. Edited by: Paula K. Davis and Carrie Browne

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    GIS Data Manager/Cartographer
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907) 451-5029 (voice)
    (907) 451-5050 (FAX)
    dggspubs@alaska.gov


Why was the data set created?

This topographic dataset supplements the geologic report, PIR 2002-2, Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska. The dataset was obtained and attributed to enhance the print quality of paper version of the geologic report. It is intended as an add-on to the geologic vector data distribution package.


How was the data set created?

  1. From what previous works were the data drawn?

    USGS, Philip Smith Mountains (B-4) (source 1 of 6)
    USGS, 1971, Philip Smith Mountains (B-4), Alaska: U.S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

    USGS, Philip Smith Mountains (C-4) (source 2 of 6)
    USGS, 1971, Philip Smith Mountains (C-4), Alaska: U. S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

    USGS, Philip Smith Mountains (D-4) (source 3 of 6)
    USGS, 1971, Philip Smith Mountains (D-4), Alaska: U.S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

    USGS, Philip Smith Mountains (B-5) (source 4 of 6)
    USGS, 1971, Philip Smith Mountains (B-5), Alaska: U.S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

    USGS, Philip Smith Mountains (C-5) (source 5 of 6)
    USGS, 1971, Philip Smith Mountains (C-5), Alaska: U.S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

    USGS, Philip Smith Mountains (D-5) (source 6 of 6)
    USGS, 1971, Philip Smith Mountains (D-5), Alaska: U.S. Geological Survey, Reston, VA, USA.

    Other_Citation_Details: 1 sheet
    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution: Topographic base-map

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

    Date: 2002 (process 1 of 1)
    Individual map separates were obtained from the US Geological Survey Earth Science Information Center in Denver, Colorado. Each mylar separate was then scanned and digitized by a contractor (Titan Systems Corporation/AverStar Group) to ADGGS specifications, creating one georeferenced vector file from each separate. The resulting files were delivered to ADGGS where ADDGS personnel attributed entities of interest.

    Data sources used in this process:

    • Philip Smith Mountains (B-4), Alaska
    • Philip Smith Mountains (C-4), Alaska
    • Philip Smith Mountains (D-4), Alaska
    • Philip Smith Mountains (B-5), Alaska
    • Philip Smith Mountains (C-5), Alaska
    • Philip Smith Mountains (D-5), Alaska

  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?

    Spatial data attributes were attached to data objects using ArcGIS 8.1. Attributes within the geologically mapped area were verified for consistency and completeness during the creation of the metadata. Entities and attributes that occur or extend beyond the geologic map boundary have not been quality controlled for completeness or accuracy.

  2. How accurate are the geographic locations?

    Individual mylar map separates were scanned and digitized to Alaska Division of Geological & Geophysical Surveys (DGGS) specifications, error magnitude associated with this step is unknown but is assumed to be small or non-existent relative to possible errors in the associated geologic dataset.

  3. How accurate are the heights or depths?

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

    This dataset includes data tables that contain information about hydrologic, hypsographic, cultural features.

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

    Topology is present on appropriate polygon and line datasets; others are point data.


How can someone get a copy of the data set?

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

Access_Constraints:
This map and data set is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published data sets utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent these data sets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    Natural Resource Technician
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    907-451-5020 (voice)
    907-451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our web site (<http://www.dggs.dnr.state.ak.us>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set?

    Preliminary Interpretive Report 2002-2

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    Please check the MapInfo web site (<http://www.mapinfo.com/>) for the latest documentation on importing ESRI shape files.


Who wrote the metadata?

Dates:
Last modified: 06-May-2008
Last Reviewed: 06-May-2008
To be reviewed: 02-Nov-2009
Metadata author:
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
c/o Simone Montayne
3354 College Road
Fairbanks, AK 99709-3707
USA

(907) 451-5036 (voice)
907-451-5050 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays.
Contact_Instructions:
Please contact us through the e-mail address above whenever possible.
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.6 on Tue May 06 14:29:36 2008