Airborne geophysical survey: Hamme, North Carolina

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.航空磁测数据由搭载于飞行器的仪器沿飞行航线采集，同步记录磁场强度值与位置信息。在早期磁测勘探工作中，此类数据的唯一可视化手段为生成带有等值线的模拟地图。本数据集为数字化等值线的重构成果，其生成方式包含两种路径：一是沿等值线轨迹进行采样，二是选取等值线与飞行航线的交点以获取对应磁场强度值。数据集包含的参数为纬度、经度与磁场强度值。