Permafrost Map of Alaska, USA  View Catalog Page Entry ID
GGD320
Summary
This data set consists of a geo-referenced digital map and attribute data derived from the publication 'Permafrost map of Alaska'. The map is presented at a scale of 1 to 2,500,000 and shows the correlation of physiographic province to presence of permafrost across the state of Alaska. The digital data were prepared under the U.S. Geological Survey Global Change Program, Land Data Systems - Arctic Land Processes Studies for display and analysis of terrain. The line work was captured by hand digitizing the source map, Ferrians, O.J., 1965, Permafrost map of Alaska - U.S. Geological Survey Miscellaneous Geologic Investigations Map I-445. Scale 1 to 2,500,000. The digital map was assembled and edited in ARC/INFO. The source map projection is polyconic. It is based on the Clarke 1866 ellipsoid with a central meridian of 150 W longitude. The data were geo-referenced from digitizer coordinates to the polyconic projection and then projected into an Albers Equal Area projection. The coastline was taken from the U.S Geological Survey, 1 to 2,000,000 scale Digital Line Graph data (U.S. Geological Survey, 1987). Attributes for the permafrost map were assigned. Metadata documentation was completed in 1996. The map units are closed polygons that are generalized in shape and size. They are defined in terms of their physiographic characteristics and association with permafrost. Each unit differs with respect to all other units and is uniquely identified as follows. 11 Mountainous Area underlain by continuous permafrost 12 Mountainous Area underlain by discontinuous permafrost 13 Mountainous Area underlain by isolated masses of permafrost 21 Lowland and Upland Area underlain by thick permafrost 22 Lowland and Upland Area underlain by moderately thick to thin permafrost 23 Lowland and Upland Area underlain by discontinuous permafrost 24 Lowland and Upland Area underlain by numerous isolated masses of permafrost 25 Lowland and Upland Area underlain by isolated masses of permafrost 26 Lowland and Upland Area generally free of permafrost
Use constraints - The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. The data are general in nature and should not be used at a scale larger than 1 to 2,500,000, that of the original map. Users must assume responsibility to determine the usability of this data for their purposes. The use of these data is not restricted and may be interpreted by organizations, agencies, units of government or others; however, they are responsible for its appropriate application. Digital data files are periodically updated. Files are dated and users are responsible for obtaining the latest revisions of the data. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. A copy of this map is presented on the CAPS Version 1.0 CD-ROM, June 1998.
Geographic Coverage
Spatial Coordinates:
N: 71.4°
S: 51°
E: 172°
W: -130°
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Multimedia Sample
Map Thumbnail
Browse image of Permafrost Map of Alaska, USA.
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Data Set Citation
Dataset Creator: Ferrians, O
Dataset Title: Permafrost Map of Alaska, USA
Dataset Release Date: 1998-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/ggd320.html
Location Keywords
- CONTINENT NORTH AMERICA UNITED STATES OF AMERICA ALASKA, USA
Science Keywords
- Agriculture Soils Permafrost
- Cryosphere Frozen Ground Permafrost
- Cryosphere Snow/Ice Permafrost
Ancillary Keywords
- Continuous Permafrost
- Discontinuous Permafrost
- Mapping
- Mountain Permafrost
- Permafrost Extent
Data Center
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Center Personnel
Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
NSIDC Frozen Ground Data Center
Data Center URL: http://nsidc.org/fgdc/
Data Center Personnel
Name: NSIDC FGDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: FTP
Distribution Format: ArcGIS
Personnel
Emily Binnian
Role: DATA AUTHOR
Phone: 1 907 786-7020
Fax: 1 907 786-7036
Email: binnian@usgs.gov
Contact Address:
- US Geological Survey
- EROS Alaska Field Office
- 4230 University Drive
City: Anchorage
Province or State: Alaska
Postal Code: 99508-4664
Country: USA
Oscar Ferrians
Role: INVESTIGATOR
Related URL
VIEW RELATED INFORMATION
GIS Data and Resources at NSIDC
Reference
Ferrians, O.J. 1965. Permafrost map of Alaska. U.S. Geological Survey. Miscellaneous Geologic Investigations Map I- 445. Scale 1:2,500,000.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 1998-01-01
Last DIF Revision Date: 2013-03-07
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