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Wisconsin Aeromagnetic Index Map and Data Table

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Wisconsin Aeromagnetic Index Map

The Wisconsin aeromagnetic  map contains data from 26 separate aeromagnetic surveys. The above map is an index to the locations of the surveys. Refer to the table below for additional facts. Publication references are listed in the bibliography.  Seven of the earlier surveys are analog and have been digitized from contour maps. Files of most digitized analog surveys may be downloaded from the USGS site: http://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-99-0557/html/mag_home.html. Digital flight line data for most surveys flown since about 1973 are available from the USGS site: https://pubs.usgs.gov/of/2002/ofr-02-361/.  Images of the high-resolution surveys (WI-10, WI-11), shown as pink on the above map, may be viewed directly.


Table of Wisconsin Aeromagnetic Surveys 

 
No
Data Type
Survey Name
 Grid* resolution Flown by
Date Flown
Flight Spacing
Flight Dir
Flight Altitude**
Field, Datum
 Data Source - References
0264 Analog Florence   USGS 06/1956-07/1956 0.25 mi. N-S 500 ft AG Total field, arbitrary datum digitized contour map: USGS, 1999
0349 Analog Wis. Lead-Zinc West   USGS 07/1960 0.25 mi. N-S 1800 ft Bar  Total field, arbitrary datum digitized contour map, King and others, 1966
0392 Analog Elk River ARMS   USGS 08/1961-09/1961 1 mi. E-W 500 ft AG  Total field, arbitrary datum digitized contour map: USGS, 1999
0573 Analog Menominee   USGS 06/1966 0.5 mi. N-S 500 ft AG  Total field, arbitrary datum digitized contour map: USGS, 1999
1133 Digital Northwest Wisconsin 200m USGS 06/1988-07/1988 0.5 mi. N-S 300 ft AG DIGRF Hittleman, and others, 1992
1157A Digital Northern Wisconsin '96 200m USGS 08/1996-09/1996 0.5 mi. N-S 500 ft AG DIGRF Snyder, 2001
1157B Digital West Wisconsin '96 200m USGS 08/1996-09/1996 0.5 mi. N-S 500 ft AG DIGRF Snyder, 2001
1157C Digital West-Central Wisc '96 200m USGS 08/1996-09/1996 0.5 mi. N-S 500 ft AG DIGRF Snyder, 2001
4031S Digital Sturgeon EM 100m Geoterrex 1980 0.25 mi. N-S 400 ft AG IGRF80 USGS, 1981
4205 Digital West-Central Wisconsin 200m Aero Surveys 02/1998-03/1998 0.5 mi. N-S 1000 ft AG DIGRF Daniels and others, 1999
4206 Digital Ironwood Fill-In 200m Aero Surveys 10/1997 0.5 mi. N-S 1000 ft AG DIGRF Daniels and others, 1999
4207 Digital West Florence Fill-In 200m Aero Surveys 10/1997 0.5 mi. N-S 1000 ft AG DIGRF Daniels and others, 1999
4208 Digital Northeastern Wisconsin 200m Aero Surveys 10/1997-12/1997 0.5 mi. N-S 1000 ft AG DIGRF Daniels and others, 1999
4209 Digital Central Wisconsin '97 200m Aero Surveys 11/1997-02/1998 0.5 mi. N-S 1000 ft AG DIGRF Daniels and others, 1999
4221 Digital S and NE Wisconsin 200m High Sense 11/1998-02/1999 0.5 mi. N-S 1000 ft AG IGRF95 Bracken and Nicholson, 1991
4222 Digital WI Eastern Shore 200m High Sense 09/1998-02/1999 0.5 mi. N-S 1000 ft AG IGRF95 Bracken and Nicholson, 1991
4223 Digital SE Wisconsin 200m High Sense 02/1999 0.5 mi. E-W 1000 ft AG IGRF95 Bracken and Nicholson, 1991
MI-07 Digital Lake Superior GLIMPCE   Canada 06/1987 1.2 mi. N-S 1000 ft AG DIGRF Teskey and others, 1991
WI-04 Grid North-central Wisconsin   Univ. Wisc. 1975? 0.5 mi. N-S 500 ft AG IGRF65 Karl and others, 1993
WI-05 Analog Central Wisconsin '61 N.   Fairchild 04/1961 0.5 mi. N-S 500 ft AG

DGRF

 digitized contour map: unpub.
WI-07 Analog Marshfield   Scintrex 12/1971-2/1972 0.25 mi. N-S 175 ft AG

?

 digitized contour map: unpub.
WI-09 Analog Potawotomi   Appl.Geophys 8/1980 0.25 mi. N-S 300 ft AG IGRF75 digitized contour map: unpub.
WI-10 Digital Oconomowoc Area 50m High Sense ? 0.125 mi. N105E 500 ft AG

IGRF80(?)

 Mudrey, 1996a
WI-11A Digital Fond du Lac Area A 50m High Sense ? 0.125 mi N40E 500 ft AG

IGRF80(?)

 Mudrey, 1996b
WI-11B Digital Fond du Lac Area B 50m High Sense ? 0.125 mi. NW-SE 500 ft AG

IGRF80(?)

 Mudrey, 1996b
WI-12 Digital SE Wisconsin 250m Mobil 1984? 0.5 mi. E-W 2000 ft Bar IGRF80 Mudrey, 1998

  * Resolution of downloadable grids

** AG= above ground (drape) survey;  Bar= barometric (level) survey

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Contact: David L. Daniels
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