Airborne geophysical survey: Connecticut Coop '63 (Includes parts of Brookhaven ARMS '58 and '59)

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）由搭载于飞行器的测量仪器沿飞行航线采集，同步记录磁场强度与位置坐标。在航空磁测的早期作业阶段，仅能通过绘制带等值线的模拟地图（Analog Map）来呈现这类观测数据。本数据集是对数字化等值线（Digitized Contour Lines）的复刻成果：既可通过沿等值线轨迹追踪采样，也可通过选取等值线与飞行航线的交点来生成对应磁场数值。本次发布的数据包含纬度、经度与航磁图磁场值三类信息。