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Digital data grids for the magnetic anomaly map of North America
A digital magnetic anomaly database and map for the North American continent is the result of a joint effort by the Geological Survey of Canada (GSC), U. S. Geological Survey... -
Illinois, Indiana, and Ohio magnetic and gravity maps and data
Aeromagnetic surveys of Illinois, Indiana, and Ohio, merged to form seamless grids across the state. Gravity anomaly data are provided as well.