Line, grid, and vector data, plot files, and descriptive project report for the airborne geophysical survey of part of the western Fortymile mining district, east-central Alaska
type: Dataset
description: This digital publication, GPR 2008-1, contains geophysical data and a digital elevation model that were produced from airborne geophysical surveys conducted in 2007 for part of the western Fortymile mining district, east-central Alaska. Aeromagnetic and electromagnetic data were acquired for 250 sq miles during the helicopter-based survey. Data provided in GPR 2008-1 include processed (1) linedata ASCII database, (2) gridded files of magnetic data, a calculated vertical magnetic gradient (first vertical derivative), apparent resistivity data, and a digital elevation model, (3) vector files of data contours and flight lines, and (4) the Contractor's descriptive project report. Data are described in more detail in the "GPR2008-1Readme.pdf" and "linedata/GPR2008-1-Linedata.txt" files included on the DVD.
issued: 2025-09-23T15:56:17.532773
modified: 2025-09-23T15:56:17.532784
spatial: Location
keyword: AmeriGEO
keyword: AmeriGEOSS
keyword: CKAN
keyword: GEO
keyword: GEOSS
keyword: National
keyword: North America
keyword: United States
keyword: aeromagnetic data
keyword: aeromagnetic map
keyword: airborne geophysical survey
keyword: alaska
keyword: apparent resistivity contours
keyword: apparent resistivity data
keyword: apparent resistivity map
keyword: dighem v em system
keyword: digital elevation model
keyword: eagle quadrangle
keyword: electromagnetic data
keyword: first vertical derivative
keyword: fortymile mining district
keyword: geophysics
keyword: hem survey
keyword: magnetic contours
keyword: state of
keyword: tanacross quadrangle

Web Resource
type: Distribution
issued: 2023-07-05T20:39:58.522948
modified: 2025-09-23T15:56:17.506988
access URL: http://www.dggs.alaska.gov/pubs/geophysics

PDF
type: Distribution
description: CSDGM IMPORT ERROR: No digtinfo/formcont
issued: 2023-07-05T20:39:58.522942
modified: 2025-09-23T15:56:17.505977
access URL: http://www.dggs.alaska.gov/pubs/geophysics

US Migrating
type: Agent