Geologic Map Index of Alaska

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Frequently anticipated questions:


What does this data set describe?

Title: Geologic Map Index of Alaska
Abstract:
The Geologic Map Index of Alaska (Map Index) is an online, interactive web mapping application that provides access to an actively growing geographic index of geology-related maps of Alaska and adjacent areas. This online research tool provides the locations and outlines of most DGGS and U.S. Geological Survey (USGS) geologic and geophysical maps of Alaska in a single, interactive web map. It allows searches of the map database by geographic area of interest, keywords, themes, publishing agency, dates, and other criteria. The search results provide links to DGGS's comprehensive, multi-agency publications database, where users may view and download publications for free. No other geographic index of Alaska geologic maps exists at this time. Map Index provides access to traditional geologic maps, as well as geophysical, sample location, geologic hazards, and geologic resources maps. DGGS plans to add outlines and data to the application for remaining geologic maps published by DGGS, USGS, U.S. Bureau of Mines, and U.S. Bureau of Land Management. Reports without maps can be accessed through DGGS's comprehensive publications database, <http://dggs.alaska.gov/pubs/advanced-search>.
Supplemental_Information:
DGGS is appreciative of collaborative support from the U.S. Geological Survey's National Geologic Map Database project (David Soller, USGS Project Chief), which provided data for thousands of U.S. Geological Survey geology-related maps in Alaska.
  1. How should this data set be cited?

    Staff, DGGS, 2013, Geologic Map Index of Alaska: Digital Data Series DDS 5, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: web application

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 140
    East_Bounding_Coordinate: -65
    North_Bounding_Coordinate: 80
    South_Bounding_Coordinate: 18

  3. What does it look like?

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

    Beginning_Date: 2000
    Ending_Date: 2013
    Currentness_Reference: in development

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: interactive map

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Point data set.

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

      The map projection used is GS_1984_Web_Mercator_Auxiliary_Sphere.

      Projection parameters:
      Standard_Parallel: 0
      Longitude_of_Central_Meridian: 0
      False_Easting: 0
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.00000001
      Ordinates (y-coordinates) are specified to the nearest 0.00000001
      Planar coordinates are specified in meters

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257223563.

  7. How does the data set describe geographic features?

    Aggregate view of tables within DGGS Oracle database
    Points and polygons with attribute data (Source: Alaska Division of Geological & Geophysical Surveys)

    Entity_and_Attribute_Overview:
    The elements, values, and definitions described are as found in the data services for Map Index data, <http://maps.dggs.alaska.gov/available>. Additional information may be found online in the user guide <http://maps.dggs.alaska.gov/mapindex/help.html>.
    Entity_and_Attribute_Detail_Citation: map_index_data_dictionary.csv


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?

    The online Map Index dataset and application were compiled and developed through funding from the federal Minerals Data and Information Rescue in Alaska (MDIRA) program and State of Alaska's General Fund. The following DGGS employees helped create the Map Index application: Jennifer Athey (project manager, geologist), Susan Seitz (database manager/programmer), Anonymous (programmer), Simone Montayne (geologist), and Ken Woods (systems administrator). Application design ideas and an application prototype were provided by Will Fisher, Geographic Information Network of Alaska (programmer). DGGS staff responsible for original data compilation: Laurel Burns (project manager, geophysicist), Robin Smith (geologist), Shelley Hicks (geologist), and Heather Erickson (geologist). USGS collaborator David Soller (Chief, National Geologic Map Database project) provided data for thousands of U.S. Geological Survey geology-related maps in Alaska.

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

    Alaska Division of Geological & Geophysical Surveys
    GIS Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    dggsgis@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays


Why was the data set created?

The Map Index interactive web mapping application will make it easier for anyone with Internet access to find the geologic maps they need to perform research, make informed resource- and land-management decisions, and better understand the geology across the state. This project was initiated and originally funded through the federal Minerals Data and Information Rescue in Alaska (MDIRA) program and continues to be supported by State of Alaska general funds.


How was the data set created?

  1. From what previous works were the data drawn?

    USGS Staff, unknown (source 1 of 1)
    U.S. Geologic Survey, unknown, National Geologic Map Database <http://ngmdb.usgs.gov/>.

    Type_of_Source_Media: electronic database
    Source_Contribution:
    Alaska maps were subset out of the NGMDB database and loaded into DGGS's publications database for the Map Index application. Alaska information can also be searched through the NGMDB Map Catalog, <http://ngmdb.usgs.gov/ngm-bin/ngm_compsearch.pl>.

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

    Date: 2011 (process 1 of 2)
    DGGS and USGS publication and geospatial data were compiled from 2000-2005 by DGGS employees. In 2003, in cooperation with DNR's Land Records Information Section (now Information Resource Management), DGGS released the first version of the "Geologic Map Index of Alaska" web application. The beta-application was desupported in 2009 and decommissioned in 2011.

    Date: 2013 (process 2 of 2)
    In 2011, DGGS received additional MDIRA funds to create a new search interface for the Map Index web search engine. The new application was originally designed and built by programmer Will Fisher, UAF-Geographic Information Network of Alaska, and then later overhauled by DGGS programmers to better fit with DGGS's IT platform. Data from the 2000-2005 compilation was imported into DGGS's enterprise database and programmatically quality checked. Additional Alaska USGS publication and geospatial information was provided by the USGS National Geologic Map Database (USGS, unknown), loaded into the DGGS enterprise database, and cross-checked with existing USGS publications. DGGS continues to update the Map Index application with additional legacy maps and new maps as they are published.

  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?

    Map Index records are checked programmatically to be consistent with other publication databases. Errors, inconsistencies, and missing records may be reported to <dnr.dggs.webapps@alaska.gov>.

  2. How accurate are the geographic locations?

    All maps have an associated spatial footprint, either as an outline surrounding the area that was mapped or as a rectangular outline representing the extent of geologic mapping. The map outlines are generalized and do not correspond exactly with the actual mapped area.

  3. How accurate are the heights or depths?

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

    On its launch, Map Index contained records for approximately 90 percent of DGGS's total geology-related map collection and approximately 70 percent of the USGS's map collection. DGGS plans to add outlines and data to the application for remaining geologic maps published by DGGS, USGS, U.S. Bureau of Mines, and U.S. Bureau of Land Management. The application will be updated irregularly with new map publications as they become available.

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

    Referential integrity among the tables is enforced by the database system.


How can someone get a copy of the data set?

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

Access_Constraints:
This report, map, and/or dataset 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 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. The 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 &amp; Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data 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 or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

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

    Alaska Division of Geological & Geophysical Surveys
    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 website (<http://www.dggs.alaska.gov>) 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?

    DDS 5

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data 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 or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 05-Dec-2013
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

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


Generated by mp version 2.9.21 on Thu Dec 5 15:03:22 2013