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Airborne magnetic survey over northeast North Dakota, 2000-2001 This data release is a re-release of an airborne geophysical survey carried out for the United States Geological Survey (USGS) by Spectra Exploration Geoscience Corp., from November 2000 to February 2001. The purpose of this survey was to acquire high-resolution, high-sensitivity aeromagnetic data over an area in northeast and north-central North Dakota and assess the area for anomalies and magnetic features pertaining to the local geology. To achieve this purpose, the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines (traverses) spaced 0.25 miles (400 meters) apart in an east-west alignment. Tie lines were flown normal to the traverses spaced at... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, Raster, Shapefile; Tags: <1GB, Cavalier County, Earth Mapping Resources Initiative, EarthMRI, Geology, Geophysics, and Geochemistry Science CenterGGGSC, All tags... MRP, Mineral Resources Program, North Dakota, Pembina County, Ramsey County, Spectra Exploration Geoscience Corperation, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), United States, United States of America, Walsh County, aeromagnetic surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, magnetic field (earth), vertical magnetic gradient, Fewer tags Airborne magnetic survey, Iron Mountain-Chatham region, central Upper Peninsula, Michigan, 2018 This publication provides digital flight line data for a high-resolution magnetic survey over an area of the central Upper Peninsula of Michigan. The survey area lies approximately between the towns of Iron Mountain and Chatham. Data for this survey were collected by EON Geosciences under contract with the USGS using a fixed wing aircraft with a magnetometer mounted in the tail stinger. The survey operated out of the Sawyer International Airport near Marquette, Michigan, from June of 2018 to September of 2018. A total of 38,474 line km of data were collected. Data were collected along north-south flight lines spaced 150 meters apart with east-west tie lines flown every 1,500 meters. The nominal terrain clearance... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, Raster, Shapefile; Tags: Alger County, Delta County, Dickinson County, Florence County, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Geophysics, Iron County, MRP, Marquette County, Menominee County, Michigan, Mineral Resources Program, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Wisconsin, aeromag, aeromagnetic, aeromagnetic surveying, airborne magnetic survey, geophysics, geoscientificInformation, geospatial datasets, magnetic field (earth), magnetic surveying, Fewer tags