Mineral Resources
Online Spatial Data
Magnetic anomaly
Aeromagnetic surveys
Illinois
Airborne geophysical surveys
Survey name
Type
Altitude
Spacing
Flight line distance
Aurora
M/R-D
121.9 m
9.60 km
2,666 km
Chicago
M/R-D
121.9 m
9.60 km
2,051 km
Argonne Joliet ARMS
M-Dz
152.4 m above ground
1.60 km
19,312 km