USGS Data Series 321: Illinois, Indiana, and Ohio Magnetic and Gravity Maps and Data: A Website for Distribution of Data

Illinois, Indiana, and Ohio Magnetic Compilation Index

Illinois Aeromagnetic Compilation Index

No.	Type	Name	Flown By	Date Flown	Spacing	Dir.	Altitude	Datum	Publication
0058	M-Dzg	Indiana	USGS	11/47-11/48	1 mi.	N-S	1000 AG	Tot.field, arb.datum	P316-B
0348A	M-Dz	Argonne Joliet ARMS	USGS	05/60-07/60	1 mi.	E-W	500 AG	Tot.field, arb.datum	GP-523
4040	M-D	Northwest Illinois	Div.Tech.	04/81	3 mi.	E-W	1800 B	IGRF75	OF82-190
4163	M-D	Wabash Valley	Aerodat	11/94	0.28 mi.	N65W	500 AG	DIGRF	Seis. Res. Let. v68
6181	M/R-D	Wisconsin-Illinois	HighLife	08/80-10/80	6 mi.	E-W	400 AG	IGRF75	GJBX-181(81)+
6191	M/R-D	Missouri-Illinois	GeoData	09/80-10/80	6 mi.	E-W	400 AG	IGRF75	GJBX-026(82)+
6194	M/R-D	Iowa Area	GeoMet.	10/80-11/80	6 mi.	E-W	400 AG	IGRF75	GJBX-046(81)+
6195	M/R-D	Indiana Area	GeoMet.	10/80-12/80	6 mi.	E-W	400 AG	IGRF75	GJBX-030(81)+
IL03	M-Dz	Southwest Illinois	MSU	?/71	1 mi.	N-S	3000 B	field removed	IL C-495
IL04	M-D	Southeast Illinois	TVA	06/77-07/77	1 mi.	N-S	1000 AG	IGRF75	CR-1014
IL05	M-D	SW Wisc. - NW Ill.	Mobil	11/83-1/84	0.5 mi.	N-S	2000 B	?	none

Indiana Aeromagnetic Compilation Index

No.	Type	Name	Flown By	Date Flown	Spacing	Dir.	Altitude	Datum	Publication
0058	M-Dzg	Indiana	USGS	11/47-11/48	1 mi.	N-S	1000 AG	Tot.field, arb.datum	P316-B
0383	M/R-Dz	Columbus ARMS	USGS	09/60-11/60	1 mi.	E-W	500 AG	Tot.field, arb.datum	GP-491
4163	M-D	Wabash Valley	Aerodat	11/94	0.28 mi.	N65W	500 AG	DIGRF	Seis. Res. Let. v68

Ohio Aeromagnetic Compilation Index

No.	Type	Name	Flown By	Date Flown	Spacing	Dir.	Altitude	Datum	Publication
0368	M/R-Dz	Pittsburgh ARMS	USGS	06/60-09/60	1 mi.	N-S	500 AG	Tot.field, arb.datum	GP-445
0383	M/R-Dz	Columbus ARMS	USGS	09/60-11/60	1 mi.	E-W	500 AG	Tot.field, arb.datum	GP-491
3184	M-D	Southeast Ohio	Airmag	10/79	1.5 mi.	E-W	2000 B	IGRF75	OF80-615
4039A	M-D	Northern Ohio West	Div.Tech.	04/81-05/81	1.5 mi.	E-W	1800 B	IGRF75	OF82-191
4039B	M-D	Northern Ohio East	Div.Tech.	04/81-05/81	2 mi.	E-W	1800 B	IGRF75	OF82-191
4069	M-D	Southern Ohio	Div.Tech.	08/81-01/82	1.5 mi.	E-W	1000 AG	IGRF75	OF83-059
C-0122	M-D	Lake Erie		09/84-08/85	1.2 mi	E-W	1000 AG	IGRF85	National Resources Canada, online
KY09	M-D	Cincinnati area	TVA	09/78	1 mi	E-W	2000 B	IGRF75	NGDC, 2001

Description of Tables:

Survey No.: Internal USGS identification number.
Survey Type: M = magnetics; R = radiometrics; D = digital data; Dz = digitized data; Dzg = digitized data-grid only.
Survey 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.
Datum: Indicates if a regional field was removed and, if it could be determined, the base value removed. Tot. (total) field = no regional was removed. Arb. (arbitrary) datum = the base value removed was not stated on the map. DIGRF = Definitive Geomagnetic Reference Field; IGRFxx = International Geomagnetic Reference Field for the model year 19xx; ? = unknown.
Publication: Brief publication reference. USGS publications are listed as: Open-File Reports = OFyy-xxx where yy is the publication year; Geophysical Maps = GP-xxxx; Professional Paper = P-xxx. Other publications: Illinois Geological Survey Circular = IL C-xxx; Nuclear Regulatory Commission = CR-xxxx; National Uranium Resource Evaluation (NURE) = GJBX.