Airborne geophysical survey: Delaware Fall Zone

Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values.

本数据集的航空磁测数据（aeromagnetic data）由机载仪器沿飞行测线采集，同步记录磁场强度值与测点位置信息。在早期磁测勘测阶段，此类数据唯一的可视化表达方式为绘制带有等值线（contour lines）的模拟地图。本数据集为数字化等值线的成果表达形式，其生成方式包括沿等值线追踪采样，或选取等值线与飞行测线的交点以提取对应磁场数值。数据集所呈现的参数包含纬度、经度与测点磁场强度值。