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OFR 99–0557: Montana Digitized Aeromagnetic Projects
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No
Name
Flown By
Date Flown
Spacing
Dir
Altitude
LnMi
Datum
Publication
0084 Bearpaw Mountains USGS 07/1950 0.5 mi. var. 1000 AG
3273
 Tot.field, arb.datum GP-150-153
0085A Boulder Batholith USGS 08/1953-11/1953 2 mi. E-W 10,500 B
3090
 Tot.field, arb.datum GP-538
0086 North Bearpaw1 USGS 10/1954 0.25 mi. E-W 500 AG
2900
 Tot.field, arb.datum GP-382-385
0207 Bozeman USGS 08/1955 0.5 mi. E-W 500 AG
2100
 Tot.field, arb.datum GP-497,498
0210 Townsend Valley USGS 08/1955 0.5 mi. E-W 500 AG
2525
 Tot.field, arb.datum GP's
0338B Pend Orielle North-central USGS 08/1959 1 mi. E-W 6000 B
120
 Tot.field, arb.datum P-646D
0338C Pend Oreille Central2 USGS 08/1959 0.5 mi. E-W 6000 B
595
 Tot.field, arb.datum P-646D
0508 Yellowstone '62 USGS 10/1962 1 mi. E-W 12,000 B
1995
 Tot.field, arb.datum 73-304
0556 Northwest Montana '65 USGS 10/1965 2 mi. NE-SW 9000 B
4100
 Tot.field, arb.datum P-726A
0608 Northern Yellowstone '67 USGS 06/1967 1 mi. E-W 12,000 B
2010
 Tot.field, arb.datum 73-304
0610 Northwest Montana '67 USGS 07/1967 2 mi. NE-SW 9000 B
2700
 Tot.field, arb.datum 69-289
0628 Mission Range USGS 10/1967 1 mi. E-W 9000 B
1650
 Tot.field, arb.datum P-726A
0652 Mission Range Fill-in3 USGS 09/1968 1 mi. E-W 9000 B
195
 Tot.field, arb.datum P-726A
0653 Little Belt Mountains USGS 09/1968 1 mi. N-S 9000 B
448
 Tot.field, arb.datum GP-837
0670 Yellowstone Regional USGS 07/1969-09/1969 1 mi. N-S 13,500 B
2979
 Tot.field, arb.datum 73-304
0671 Selway-Bitterroot USGS 09/1969 1 mi. N-S 11,000 B
5715
 Tot.field, arb.datum GP-832,835,841
0691 Beartooth USGS 09/1970 1 mi. N-S 13,500 B
1087
 Tot.field, arb.datum 73-304
0701A Idaho Regional North USGS 10/1970 5 mi. E-W 12,000 B
1015
 IGRF65 71-290,72-388
3004 N.E. Idaho-W. Montana LKB 08/1968 1 mi. E-W 7000 B
9000
 Tot.field, arb.datum GP-682-691
3009 Missoula MT Univ. ?/1971 1 mi. N-S 7500 B
4200
 ? GP-934
3015A Washington-Idaho-Montana Scintrex 07/1972-09/1972 2 mi. E-W 7000 B
5245
 IGRF65 73-294, 295
3015B WA-ID-MT - E. Central Scintrex 07/1972-09/1972 2 mi. E-W 11,000 B
1920
 IGRF65 73-293-295
3015C WA-ID-MT - East Scintrex 07/1972-09/1972 2 mi. E-W 7000 B
930
 IGRF65 73-293-295
3021B Idaho-Montana4 GeoMet. 06/1972-10/1972 2 mi. E-W 12,000 B
5450
 IGRF65, 56670 75-655
3021D South-central Montana GeoMet. 06/1972-08/1972 2 mi. E-W 12,000 B
1140
 IGRF65, 57860 75-656
4020 Italian Peak Geodata 02/1981-03/1981 0.5 mi. NE-SW 1000 AG
1030
 IGRF75 81-1162
4041 Northeast Mt.-Western N.D Airmag 09/1980 3 mi. E-W 4000 B
6955
 IGRF75, 59059 81-434

1 Southeast part of Project 0086 was not digitized.
2 See Project 0338B. Project 0338C is fully merged with 0338B.
3 See Project 0628.  Project 0652 is fully merged with 0628.
4 Only part of Project 3021B was digitized and the center section has erronious data.

Click on the individual survey numbers that are of interest to download ASCII XYZ file to your hard drive or click on the name to view a point plot.

Description of Table

No.: Internal USGS identification number
Name: Internal project name (not always the name used in publication title)
Flown By: Company or government agency who flew the original survey
Spacing and Dir.: Primary flight-line spacing and primary flight-line direction
Altitude: Primary flight altitude in feet; B = barometric elevation, AG = above ground draped over topography
LnMi.: Approximate total of line miles flown for this survey
Datum: Indicates if a regional field was removed and, if it could be determined, the base value removed. Total field = no regional was removed. Arb. (arbitrary) datum = the base value removed was not stated on the map.
Publication: Brief publication reference*. USGS publications are listed as: Open-File reports = xx-yyyy where xx is the publication year, Bulletins and Professional Papers = B-yyyy or P-yyyy, Geophysical Maps = GP-yyyy, Miscellaneous Field Studies Maps = MF-yyyy, Miscellaneous Investigations Maps = I-yyyy, Unpub = unpublished data, refers to all or part of the original project area.

*For more complete references see: Hill, P. L., 1991, Bibliographies and location maps of publications on aeromagnetic and aeroradiometric surveys for the states west of approximately 104° longitude (exclusive of Hawaii and Alaska): U.S. Geological Survey Open-File Report 91-0370-A, 172 p. 

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Further information about aeromagnetic data from the state of Kentucky can be obtained by contacting Pat Hill, (303) 236-1343, email (pathill@usgs.gov), or Bob Kucks, (303) 236-1405, email (rkucks@usgs.gov), or click the button below.
 

Map of Composite
and Merged
Aeromagnetic Data for
Montana
Data Format 
and 
Digitizing Technique
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This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial Standards. Use of brand names is for descriptive purposes and does not constitute endorsement by the U.S. Geological Survey.

Last modified 9/14/1999.

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