Latitudes and longitudes of volcanoes in Alaska

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Frequently-anticipated questions:


What does this data set describe?

Title: Latitudes and longitudes of volcanoes in Alaska
Abstract:
This publication provides digital point data for the locations of 127 volcanic centers in Alaska younger than 2 million years. Information about whether a volcano has been historically active is also provided. Detailed information about each center can be found on the Alaska Volcano Observatory website at <http://www.avo.alaska.edu>
Supplemental_Information:
The volcano locations in this file were compiled from existing publications whenever possible, and from USGS topographic maps when published locations could not be found. In the case of more than one published location for a volcano, additional maps of the volcano, as well as people who have expert knowledge of the volcano, were consulted. 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:
AKvolclatlong     latitudes and longitudes of volcanoes
  1. How should this data set be cited?

    Cameron, C.E., 2005, Latitudes and longitudes of volcanoes in Alaska: Raw Data File RDF 2005-3, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -178.793900
    East_Bounding_Coordinate: 179.831680
    North_Bounding_Coordinate: 67.300000
    South_Bounding_Coordinate: 51.790300

  3. What does it look like?

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

    Calendar_Date: 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?

    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 0.000001 degree. Longitudes are given to the nearest 0.000001 degree. Latitude and longitude values are specified in Decimal degrees.

      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 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    AKvolclatlong.shp
    Point shapefile containing latitudes and longitudes of volcanoes younger than 2 million years in Alaska (Source: See sources listed in Process_Step)

    VolcNameID
    Unique ID of a volcano, assigned by GeoDIVA (Source: Geologic Database of Information on Volcanoes in Alaska (GeoDIVA))

    Any integer, assigned randomly by database

    Volcano
    Name of a volcano (Source: Geologic Database of Information on Volcanoes in Alaska (GeoDIVA))

    Volcano names: short, most commonly used name of a volcanic center

    Historical
    Whether or not a specific volcano has been active in historical time, as defined by Miller and others (1998) (Source: Miller and others (1998))

    A "1" in this field indicates the volcano has been historically active. All other values indicate no confirmed historical activity.

    Latitude
    Latitude of a volcano (Source: Geologic Database of Information on Volcanoes in Alaska (GeoDIVA))

    Range of values
    Minimum:51.7903
    Maximum:67.3
    Units:Decimal degrees
    Resolution:0.0001 degrees

    Longitude
    Longitude of a volcano (Source: Geologic Database of Information on Volcanoes in Alaska (GeoDIVA))

    Range of values
    Minimum:-178.7939
    Maximum:179.82972
    Units:Decimal degrees
    Resolution:0.0001 degrees


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 dataset was created as part of the Alaska Volcano Observatory's Geological Database of Information on Volcanoes in Alaska (GeoDIVA) project.

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

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

    (907) 451-5010 (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 address all comments or questions to the e-mail address above whenever possible.


Why was the data set created?

To provide an authoritative file of volcano locations


How was the data set created?

  1. From what previous works were the data drawn?

    Miller and others (1998) (source 1 of 8)
    Miller, T.P., McGimsey, R.G., Richter, D.H., Riehle, J.R., Nye, C.J., Yount, M.E., and Dumoulin, J.A., 1998, Catalog of the historically active volcanoes of Alaska: Open-File Report OF 98-582, U.S. Geological Survey, Anchorage, AK.

    Online Links:

    Other_Citation_Details: 104 p.
    Type_of_Source_Media: paper, online
    Source_Contribution: Names and locations of historically active volcanoes in Alaska

    Schaefer and Nye (2002) (source 2 of 8)
    Schaefer, Janet, and Nye, C.J., 2002, Historically active volcanoes of the Aleutian Arc: Miscellaneous Publication MP 123, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:3,000,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 3000000
    Source_Contribution:
    Names and locations of historically active volcanoes in the Aleutians

    Wood and Kienle (1990) (source 3 of 8)
    Wood, C.A. (ed.), and Kienle, Juergen (ed.), 1990, Volcanoes of North America: United States and Canada: Cambridge University Press, New York, NY.

    Online Links:

    • NONE

    Other_Citation_Details: 345 p.
    Type_of_Source_Media: paper
    Source_Contribution: Names and locations of volcanoes younger than 5 million years

    Simkin and Siebert (1994) (source 4 of 8)
    Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world: Geoscience Press, Tuscon, AZ.

    Online Links:

    • NONE

    Other_Citation_Details: 349 p.
    Type_of_Source_Media: paper
    Source_Contribution: Names and locations of Holocene volcanoes in Alaska

    Motyka and others (1993) (source 5 of 8)
    Motyka, R.J., Liss, S.A., Nye, C.J., and Moorman, M.A., 1993, Geothermal resources of the Aleutian Arc: Professional Report PR 114, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 17 p., 4 sheets, scale 1:1,000,000
    Type_of_Source_Media: paper, online
    Source_Scale_Denominator: 1000000
    Source_Contribution: Names and locations of active volcanoes in Alaska

    Reed and others (1992) (source 6 of 8)
    Reed, B.L., Lanphere, M.A., and Miller, T.P., 1992, Double Glacier Volcano, a "new" Quaternary volcano in the eastern Aleutian volcanic arc: Bulletin of Volcanology v. 54, n. 8.

    Online Links:

    • NONE

    Other_Citation_Details: p. 631-637
    Type_of_Source_Media: paper
    Source_Contribution: Name and location of Double Glacier volcano

    Hildreth and others (1999) (source 7 of 8)
    Hildreth, W., Fierstein, J., Lanphere, M.A., and Siems, D.F., 1999, Alagogshak volcano: a Pleistocene adesite-dacite stratovolcano in Katmai National Park: Professional Paper PP 1614, U.S. Geological Survey, Reston, VA.

    Online Links:

    • NONE

    Other_Citation_Details: p. 105-113
    Type_of_Source_Media: paper
    Source_Contribution: Name and location of Alagogshak volcano

    Hildreth and others (2004) (source 8 of 8)
    Hildreth, Wes, Fierstein, Judy, Siems, D.F., Budahn, J.R., and Ruiz, Joaquin, 2004, Rear-arc vs. arc-front volcanoes in the Katmai reach of the Alaska Peninsula: a critical appraisial of across-arc compositional variation: Contributions to Mineralogy and Petrology v. 147, n. 3.

    Online Links:

    • NONE

    Other_Citation_Details: p. 243-275
    Type_of_Source_Media: paper
    Source_Contribution:
    Names and locations of recently located volcanoes on the Alaska Peninsula

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

    Date: 2005 (process 1 of 1)
    Latitudes and longitudes of Alaskan volcanoes younger than 2 million years were compiled from existing published and unpublished datasets. In instances where no data was available for a volcano location, the latitude and longitude of a volcanic vent was derived using heads-up digitizing from on-screen topographic maps. This dataset represents the "best" locations for each volcano.

    Data sources used in this process:

    • Published sources were: Hildreth and others (2004); Hildreth and others (1999); Reed and others (1992); Moytka and others (1993); Simkin and Siebert (1994); Wood and Kienle (1990); Schaefer and Nye (2002); and Miller and others (1998).

  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?

    The attributes of this geospatial dataset consist of text identifiers and numeric codes that indicate the name, latitude, and longitude of Alaska volcanoes younger than 2 million years. Volcanoes that have been active during historic time (as described in Miller and others, 1998, Catalog of Historically Active Volcanoes) are attributed with a "1" in the "Historical" column. To check attribute accuracy, plots of volcano names and locations were visually compared with other Alaska maps and volcano listings.

  2. How accurate are the geographic locations?

    Points were located by compiling previously published data, or in the case of no previously published location, heads-up screen digitization of mapped data using raster images of topographic base maps to an estimated horizontal accuracy of about 1,000 m.

  3. How accurate are the heights or depths?

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

    This dataset includes volcano names of volcanoes in Alaska younger than 2 million years, as compiled in Miller and others (1998), Simkin and Siebert (1994), and Wood and Kienle (1990), as well as additional features located by Alaska Volcano Observatory geologists. In instances where the same feature is known by different names, this dataset attempts to use the most common name. In instances where a volcanic feature contains many smaller volcanic vents (for instance, Pyre Peak is a smaller vent at Seguam volcano), this dataset names only the larger feature.

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

    This dataset consists only point data and does not require topology.


How can someone get a copy of the data set?

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

Access_Constraints:
This 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 hardcopies or published datasets utilizing these datasets must 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?

    Raw Data File 2005-3

  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: 05-Jan-2009
Metadata author:
State of Alaska, Division of Geological & Geophysical Surveys
c/o Cheryl Cameron
Geologist III, Alaska Volcano Observatory
3354 College Road
Fairbanks, AK 99709-3707
USA

(907) 451-5010 (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 address all comments or questions to 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 14:29:37 2008