Airborne geophysical survey: Massachusetts Coop '65 (Includes parts of Rowe ARMS '59 and Brookhaven ARMS '60)

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.

航空磁力数据由飞行器搭载的仪器沿飞行航线采集，同步记录磁场强度与位置坐标。在航空磁测发展早期，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的成果化呈现，其数字化流程包括沿等值线逐点采样，或选取等值线与飞行航线的交点并提取对应磁场强度值。数据集包含的三类数据分别为纬度、经度与地图磁场强度值。