Airborne geophysical survey: Rhode Island Fault (Includes part of Brookhaven ARMS '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.

航空磁力数据（Aeromagnetic data）由机载仪器沿飞行航线采集，同步记录磁场强度与位置坐标。在早期航空磁测阶段，此类数据唯一的可视化表达方式为生成带有等值线的模拟地图。本数据集通过两种方式对数字化等值线进行还原：一是沿等值线轨迹采样，二是选取等值线与飞行航线的交点以提取磁场数值。本次呈现的数据集包含纬度、经度与绘图用磁场强度三项内容。