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: 2025-11-22T18:49:01.896557
modified: 2025-11-22T18:49:01.896561
spatial: Location
keyword: aeromagnetic-data
keyword: aeromagnetic-map
keyword: airborne-geophysical-survey
keyword: alaska
keyword: amerigeo
keyword: amerigeoss
keyword: apparent-resistivity-contours
keyword: apparent-resistivity-data
keyword: apparent-resistivity-map
keyword: ckan
keyword: dighem-v-em-system
keyword: digital-elevation-model
keyword: eagle-quadrangle
keyword: electromagnetic-data
keyword: first-vertical-derivative
keyword: fortymile-mining-district
keyword: geo
keyword: geophysics
keyword: geoss
keyword: hem-survey
keyword: magnetic-contours
keyword: national
keyword: north-america
keyword: state-of
keyword: tanacross-quadrangle
keyword: united-states

Web Resource
type: Distribution
issued: 2020-11-10T16:13:12.293517
modified: 2025-11-22T18:49:01.883205
access URL: http://www.dggs.alaska.gov/pubs/geophysics

PDF
type: Distribution
description: CSDGM IMPORT ERROR: No digtinfo/formcont
issued: 2020-11-10T16:13:12.293506
modified: 2025-11-22T18:49:01.882715
access URL: http://www.dggs.alaska.gov/pubs/geophysics

US Migrating
type: Agent