Airborne geophysical survey: Sierra Nevada '63 West, 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.

航空磁测数据由机载仪器沿飞行航线采集，同步记录磁场数值与点位位置。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。本数据集为数字化等值线成果，其生成方式包括沿等值线追踪采样，或选取等值线与飞行航线的交点以获取对应磁场数值。本次公开的数据包含纬度、经度与磁场强度三项参数。