Airborne geophysical survey: Yellowstone '62, Wyoming

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（aeromagnetic data）由机载仪器沿飞行航线采集，同步记录磁场强度值与位置信息。在早期航空磁测作业中，呈现该类数据的唯一途径为绘制带有等值线的模拟地图。本数据集是对数字化等值线的标准化呈现：可通过沿等值线追踪采样，或选取等值线与飞行航线的交点以获取对应的磁场强度数值。本次数据集包含的字段为纬度、经度与地图磁场强度值。