Airborne geophysical survey: North Coastal Area Southeast, California

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.

航空磁力数据由机载仪器沿飞行航线采集，记录了磁场强度值与位置信息。
在早期勘测阶段，此类数据仅能通过生成带等值线的模拟地图进行可视化呈现。
本数据集是对数字化等值线的重构，其数据可通过两种方式获取：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得到对应的磁场强度值。
本次提供的数据包含纬度、经度与航磁强度值。