Missouri Breaks Project, Montana - Digitized aeromagnetic data

From February 12 to March 8, 1981, EG and G Geometrics conducted an aeromagnetic survey in Montana for Anaconda Copper Company. A Piper Navajo aircraft was used to conducted the survey. The survey was flown along north-south flightlines spaced 660 feet at a nominal height of 450 feet above the terrain. Five uniformly spaced east-west tie-lines were also flown. During processing, the International Geomagnetic Reference Field (IGRF) of 1975 was updated to 1981 and removed from the survey observations. The resultant anomalous magnetic field was contoured at a 4.0 gamma interval and plotted to map sheets. In 2016, the map sheets were scanned, registered, and the contours were digitized. The point data released here were extracted from the digitized contour lines and include: latitude, longitude, and magnetic-field value (gamma).

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:573cf012e4b0dae0d5e4b18d
metadata_type geospatial
modified 20200820
old-spatial -109.002552105, 47.6885183876, -108.33873906, 48.0280572626
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 60438a146e0b9bb0248e31a84857fbdae96f62ab
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-109.002552105, 47.6885183876], [-109.002552105, 48.0280572626], [ -108.33873906, 48.0280572626], [ -108.33873906, 47.6885183876], [-109.002552105, 47.6885183876]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • aeromagnetic-data
  • aeromagnetic-surveying
  • airborne-surveys
  • amerigeo
  • amerigeoss
  • blaine-county
  • ckan
  • dodson-quadrangle
  • fergus-county
  • field-monitoring-stations
  • geo
  • geophysical-surveys
  • geophysics
  • geospatial-datasets
  • geoss
  • gis
  • havre-quadrangle
  • lewistown-quadrangle
  • little-rocky-mountains
  • magnetic
  • magnetic-field-earth
  • magnetic-surveys
  • montana
  • national
  • north-america
  • phillips-county
  • residual-magnetic-field
  • total-field
  • united-states
  • usgs-573cf012e4b0dae0d5e4b18d
  • zortman-quadrangle
isopen False
license_id notspecified
license_title License not specified
maintainer Eric D. Anderson
maintainer_email ericanderson@usgs.gov
metadata_created 2025-11-22T23:00:10.592292
metadata_modified 2025-11-22T23:00:10.592297
notes From February 12 to March 8, 1981, EG and G Geometrics conducted an aeromagnetic survey in Montana for Anaconda Copper Company. A Piper Navajo aircraft was used to conducted the survey. The survey was flown along north-south flightlines spaced 660 feet at a nominal height of 450 feet above the terrain. Five uniformly spaced east-west tie-lines were also flown. During processing, the International Geomagnetic Reference Field (IGRF) of 1975 was updated to 1981 and removed from the survey observations. The resultant anomalous magnetic field was contoured at a 4.0 gamma interval and plotted to map sheets. In 2016, the map sheets were scanned, registered, and the contours were digitized. The point data released here were extracted from the digitized contour lines and include: latitude, longitude, and magnetic-field value (gamma).
num_resources 2
num_tags 31
title Missouri Breaks Project, Montana - Digitized aeromagnetic data