ak_volccent_polygon locations of volcanic centers akvolcanoes_point locations of volcanoes volcano4mil_age_annotation age annotations for volcanoes and volcanic centers volcano4mil_annotation name annotations for volcanoes and volcanic centers
Nye, C.J., 1998, Volcanoes of Alaska: Information Circular IC 38 ed. 1998, State of Alaska, Division of Geological and Geophysical Surveys, Fairbanks, Alaska - USA.Online Links:
The map projection used is Albers Conical Equal Area.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.008192
Ordinates (y-coordinates) are specified to the nearest 0.008192
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 1/294.98.
| Range of values | |
|---|---|
| Minimum: | -178.794 |
| Maximum: | 179.6306 |
| Units: | decimal degrees |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 64.07 |
| Units: | decimal degrees |
Volcano names: short, most commonly used name of a volcanic center
| Range of values | |
|---|---|
| Minimum: | 180 |
| Maximum: | 3375 |
| Units: | meters |
Volcano type, generally assigned according to the volcano's eruptive characteristics, shape, and formation history
Approximate age in years, geologic period, or epoch
Most common eruption style for each volcano ranging from effusive to caldera-forming
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 41 |
| Units: | known eruptions |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 119 |
| Units: | Unknown |
| Value | Definition |
|---|---|
| Interior | Volcano is located in the interior portion of the Alaska mainland |
Volcano names: short, most commonly used name of a volcanic center
Approximate age in years, geologic period, or epoch
This research was partially supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number 1434-HQ-96-GR-02713. Additional Acknowledgments: Geology modified from Schmoll and Dobrovolny (1972). Digital cartography by R.A. Combellick and S.M. Weems, with suggestions by A.L. Schell. R.D. Reger and P.J. Haeussler provided helpful comments on the draft map and cross sections.
(907) 451-5020 (voice)
(907) 451-5050 (FAX)
dggspubs@alaska.gov
The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological & Geophysical Surveys (DGGS). AVO monitors and studies Alaska's hazardous volcanoes, predicts and records eruptive activity, and works closely with other agencies to implement public safety measures.
Luedke, R.G., and Smith, R.L., 1986, Map showing distribution, composition, and age of late Cenozoic volcanic centers in Alaska: U.S. Geological Survey Map I 1091-F, U.S. Geological Survey, Washington, DC, USA.Online Links:
Myers, B., Stauffer, P., and Hendley, J.W. II, 1997, What are volcano hazards?: U.S. Geological Survey Fact Sheet 002-97, U.S. Geological Survey, Washington, DC, USA.
Plafker, George, Gilpin, L.M., and Lahr, J.C., 1994, Neotectonic map of Alaska:.This is part of the following larger work.
Plafker, George (ed.), and Berg, H.C. (ed.), 1994, Geology of Alaska: None v. G-1, Geological Society of America, Boulder, CO.
Moore, G.M., 1992, Plate tectonic map of the Circum-Pacific Region, Arctic Sheet: U.S. Geological Survey Circum-Pacific map series CP-41, U.S. Geological Survey, Washington, DC, USA.
Wood, C.A., and Kienle, J., 1990, Volcanoes of North America-United States and Canada: None None, Cambridge University Press, Washington, DC, USA.
Data sources used in this process:
The "ak_volccent" data was created by digitizing points from a paper copy of U.S. Geological Survey Map I-1091-F, showing distributions, composition and age of late Cenozoic volcanic centers in Alaska. Coverages were created using Arc/Info 7.0.4, distributed by ESRI, Inc. Locations of volcanoes were acquired from latitude and longitude points found in Luedke and Smith (1990) and Wood and Kienle (1990), although errors may exist. The points were entered into a spreadsheet and e00 coverages were created using GIS software. The structural lines on the map may have been digitized into a GIS environment using data from Plafker and others (1994) and Moore (1992), or an unknown source.
This data set includes locations of volcanoes and volcanic centers in Alaska as of 1998. The elevation, morphology, age, type of eruption, and number of eruptions was gathered in July 1997.
Polygon topology present and clean on appropriate data. Other data are line, point, or annotation data and do not require topologic relationships.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- This report, 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.
907-451-5020 (voice)
907-451-5050 (FAX)
dggspubs@alaska.gov
Information Circular 38 ed. 1998
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.
Current publication is available on paper. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard.
Printed publication can be purchased for $3.00 (contact information below) plus shipping if mailed.
| Data format: | PDF (version 1.6) |
|---|---|
| Network links: |
<http://dx.doi.org/10.14509/7043> |
| Data format: | ArcGIS Shapefile (version ESRI ArcGIS 9.x) |
|---|---|
| Network links: |
<http://dx.doi.org/10.14509/7043> |
| Media you can order: |
CD-ROM
(format Joliet)
|
Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files.
Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (<http://www.dggs.alaska.gov/>) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard.
Digital downloads: less than 30 minutes for most files. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid.
Please check the MapInfo web site (<http://www.mapinfo.com/>) for the latest documentation on importing ESRI shape files.
907-451-5039 (voice)
907-451-5050 (FAX)
dggspubs@alaska.gov