Engineering-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska

Metadata also available as - [Parseable text] - [XML]

Frequently-anticipated questions:


What does this data set describe?

Title:
Engineering-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska
Abstract:
The engineering-geologic map, on two sheets, is derived electronically from the surficial-geologic map of the initial segment of the proposed natural gas pipeline corridor through the upper Tanana valley (Reger and others, PIR 2008-3a) using Geographic Information System (GIS) software. Surficial-geologic units were initially identified by interpretation of false-color ~1:63,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2006 and 2007. The map shows the distribution of surficial-geologic and bedrock units grouped genetically with common properties that are typically significant for engineering applications.
Supplemental_Information:
The layers listed below are present as ArcGIS shape files. To enhance print quality, this publication utilized a vector topography data set. The topography data set is not included with this release. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. A codeset file titled, PIR2008-3B_codeset.pdf, contains the table explaining the properties of each engineering-geologic unit. There are two layers. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label. "Layers include:
eng_geology	polygons of surficial-geologic map units
outline	outline shape of the study area
  1. How should this data set be cited?

    Reger, R.D., and Solie, D.N., 200812, Engineering-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3B, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.

    Online Links:

    Other_Citation_Details: 2 sheets, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -145.947285
    East_Bounding_Coordinate: -143.936074
    North_Bounding_Coordinate: 64.126215
    South_Bounding_Coordinate: 63.497248

  3. What does it look like?

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

    Calendar_Date: 1978
    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?

      This is a Vector 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
      False_Easting: 500000.0
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000000001
      Ordinates (y-coordinates) are specified to the nearest 0.000000001
      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 6378206.4.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    outline.shp
    polygon outlining boundary of map area (Source: Alaska Division of Geological & Geophysical Surveys)

    Shape
    shape of polygon outlining map boundary (Source: Alaska Division of Geological & Geophysical Surveys)

    shape of map area

    EngGeol.shp
    engineering geology map unit contacts (Source: Alaska Division of Geological & Geophysical Surveys)

    unit
    Map unit label shown on map and described in text and codeset.pdf (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:PIR2008-3B_codeset.pdf
    Codeset Source:Alaska Division of Geological & Geophysical Surveys <http://www.dggs.dnr.state.ak.us/metadata/PIR2008-3B_codeset.pdf>


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 research was supported by Alaska State Capital Improvement Projects funding. The authors gratefully acknowledge the helpful review by De Anne Stevens, and able cartographic assistance by Kyle Obermiller.

  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

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

    Contact_Instructions:
    You may view our web site at <http://www.dggs.dnr.state.ak.us> for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change.


Why was the data set created?

This map is a part of ADGGS's Alaska Natural Gas Pipeline Geology and Geohazards project, mapping the geology, geohazards and resources along the the Alaska Highway between Delta Junction and Dot Lake. The study was done in anticipation of the proposed natural gas pipeline along the Alaska Highway corridor, to further the geologic understanding of the area andas a basis for evaluating geohazards and resources for proposed infrastructure.


How was the data set created?

  1. From what previous works were the data drawn?

    Kreig and Reger, 1982 (source 1 of 6)
    Kreig, R.A., and Reger, R.D., 1982, Air-photo analysis and summary of landform soil properties along the route of the Trans-Alaska Pipeline System: Geologic Report GR-66, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 149 p.
    Type_of_Source_Media: paper
    Source_Contribution:
    Contains air-photo analysis and landform soil properties for trans-Alaska oil pipeline

    Pewe and Reger, 1983 (source 2 of 6)
    Pewe, T.L., and Reger, R.D., 1983, Middle Tanana River valley: Guidebook Guidebook 1, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details:
    in Pewe, T.L., and Reger, R.D., eds., Guidebook to permafrost and Quaternary geology along the Richardson and Glenn Highways between Fairbanks and Anchorage, Alaska, p. 5-45
    This is part of the following larger work.

    Pewe, T.L., ed., and Reger, R.D., ed., 1983, Guidebook to permafrost and Quaternary geology along the Richardson and Glenn Highways between Fairbanks and Anchorage, Alaska: Guidebook Guidebook 1, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Type_of_Source_Media: paper
    Source_Contribution: Contains information about Quaternary geology of Tanana Valley

    Carter and Galloway, 1978 (source 3 of 6)
    Carter, L.D., and Galloway, J.P., 1978, Preliminary engineering geologic maps of the proposed natural gas pipeline route in the Tanana River valley, Alaska: Open-file report OFR 78-794, U.S. Geological Survey, United States.

    Other_Citation_Details: 26 p., 3 map sheets, scale 1:125,000
    Type_of_Source_Media: paper
    Source_Contribution: engineering geologic maps at 1:125,000

    Mason and Beget, 1991 (source 4 of 6)
    Mason, O.K., and Beget, J.E., 1991, Late Holocene flood history of the Tanana River, Alaska: Arctic and Alpine Research, United States.

    Other_Citation_Details: v. 23, no. 4, p. 392-403.
    Type_of_Source_Media: paper
    Source_Contribution: Holocene flooding in Tanana valley

    Yarie and others, 1998 (source 5 of 6)
    Yarie, John, Viereck, Leslie, Van Cleve, Keith, and Adams, Phyllis, 1998, Flooding and ecosystem dynamics along the Tanana River: BioScience, United States.

    Other_Citation_Details: v. 48, no. 9, p. 690-695.
    Type_of_Source_Media: paper
    Source_Contribution: Flooding along the Tanana River

    Reger and others, 2008 (source 6 of 6)
    Reger, R.D., Stevens, D.S.P., and Solie, D.N., 200812, Surficial-geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3a, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 35 p., 2 sheets, scale 1:63,360.
    Type_of_Source_Media: online
    Source_Contribution:
    Source of surficial geologic map from which engineering geology map units were derived

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

    Date: 2008 (process 1 of 4)
    Digital cartography- Engineering geologic map polygons were derived from surficial geology map polygons using ArcMap 9.3. The map was then attributed and edited.

    Date: 2007 (process 2 of 4)
    Fieldwork - Reconnaissance field work was done in September 2006, and additional fieldwork was done In July-August 2007. In addition to observations from ground traverses, materials properties were observed in several soil pits that were dug using shovels to maximum depth of 1.3 meters and by observations of exposures along river banks and highway cuts.

    Date: 2008 (process 3 of 4)
    Interpretation of engineering properites. Mapped surificial-geologic deposits were gouped according to similar egineering-geologic properties.

    Data sources used in this process:

    • Reger and others, 2008
    • Krieg and Reger, 1982
    • Pewe and Reger, 1983
    • Carter and Galloway, 1978
    • Mason and Beget, 1991
    • Yarie and others, 1998

    Date: 2008 (process 4 of 4)
    Metadata creation - Metadata were assembled by D.N. Solie to FGDC Standards using Metavist 1.2, DGGS 7.05, a data entry program for FGDC metadata with XML output.

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

    Reger, R.D., and Solie, D.N., 200809, Reconnaissance interpretation of permafrost, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3C, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 10 p., 2 sheets, scale1:63,360
    Carver, G.A., Bemis, S.P., Solie, D.N., and Obermiller, K.E., 200812, Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: preliminary interpretive report PIR 2008-D, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 32 p.
    Solie, D.N., Werdon, M.B., Newberry, R.J., Freeman, L.K., and Lessard, R.R., 200802, Major-oxide, minor-oxide, trace-element and geochemical data from rocks collected in the Alaska Highway corridor, Mount Hayes quadrangle, Alaska in 2006 and 2007: Raw-data File RDF 2008-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 23 p.
    Reger, R.D., Stevens, D.S.P., and Solie, D.N., 200812, Surficial geology, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3A, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.

    Other_Citation_Details: 35 p., 2 sheets, scale 1:63,360


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

  1. How well have the observations been checked?

    Initial reconnaissance field observations were made in 2006, after which surficial geology air-photo interpretations were done. Engineering-geologic map units were derived from the surficial-geologic map (PIR 2008-3A). Physical properties of engineering-geologic map units are interpretive, based on extrapolation from verified localities and from previously published reports and data. Potential geologic hazards are inferred from the typical physical properties of map units, including sediment texture and ground-ice content, and their typical topographic settings. Except for a few test pits, no subsurface investigations or laboratory analyses were performed for this publication. The reader is cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes.

  2. How accurate are the geographic locations?

    The engineering-geologic map units were derived from the surficial-geologic map (PIR 2008-3A). The surficial-geologic map contacts were first hand-drawn, using a magnifying stereoscope, onto acetate overlays registered to 1:50,000-scale (nominal) prints of digital aerial photographs. The horizontal accuracy of the map unit boundary locations varies due to the scale and interpretive nature of the mapping, but is expected to be accurate to at least 15 m. The 400dpi digital air photos were orthorectified using OrthoMapper 3.6 with an RMS error generally constrained to be less than 4 pixels, equating to approximately 20 m on the ground, although some areas with rugged terrain have larger errors. The individual orthophotos were mosaicked using Erdas Imagine 9.2 and ArcGIS 9. The acetate overlays were individually scanned and orthorectified using OrthoMapper based on the same equations developed for generating the orthophotos. Map unit boundaries were digitized on-screen into ArcGIS from the orthorectified overlays at a scale of approximately 1:25,000, using a combination of a digital USGS topographic 1:63,360-scale map layer (DRG) and the orthophoto mosaic layer to verify the position of the lines. Total horizontal accuracy of the mapped surficial-geologic contacts is thus on the order of 25 m or better, with somewhat lesser accuracy expected in areas of rugged relief.

  3. How accurate are the heights or depths?

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

    This dataset includes coverages that contain information about the mapped and interpreted engineering-geologic deposits in the map area. Subsurface data were not available for use in creating this map coverage, other than about 10-15 soil pits dug to depths no more than 1.3 m, observations of exposures in gravel pits, highway cuts, and river banks, and drillhole data from geotechnical reports written by the Department of Transportation and Public Facilities for highway construction projects. No analytical tests were conducted for this report. The table describes engineering propoerties that are generally present in the mapped surficial deposits, but local variations and exceptions are most certainly to be expected. The reader is therefore cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes.

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

    Polygon topology is present on appropriate coverages


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/or dataset are 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 datasets utilizing these datasets 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 datasets, 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 PIR 2008-3b

  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?

    It is suggested that MapInfo users import ESRI shape files (if provided) due to the possibility of data loss when importing Arc Export .e00 files. Please check the MapInfo Web site (<http://www.mapinfo.com/>) for the latest documentation on importing Arc Export and/or ESRI shape files.


Who wrote the metadata?

Dates:
Last modified: 09-Dec-2008
Metadata author:
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

907-451-5039 (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 Mon Dec 29 14:29:58 2008