Airborne geophysical survey: Albuquerque, New Mexico

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.

航空磁力数据由航空器搭载的仪器沿飞行航线采集，同步记录磁场强度值与位置信息。在航空磁测的早期阶段，此类数据仅能通过绘制带等值线的模拟地图进行展示。本数据集为原始模拟等值线的数字化重构成果，其生成方式包含两种：一是沿原始等值线轨迹进行采样，二是选取等值线与飞行航线的交点并提取对应磁场强度值。所呈现的数据包含纬度、经度及地图标注的磁场强度值。