Airborne geophysical survey: Northwest Illinois--Southeast Wisconsin

Aeromagnetic data were collected along flight lines by instruments in an
aircraft that recorded magnetic-field values and locations. This dataset
presents latitude, longitude, altitude, and magnetic-field values.

航空磁测数据由航空器搭载的仪器沿飞行航线采集，仪器可记录磁场值与定位信息。本数据集包含纬度、经度、海拔高度以及磁场值四类数据。