Airborne geophysical survey: Casper 1° x 2° Quadrangle

Aeromagnetic and aeroradiometric data were collected along flight lines by
instruments in an aircraft that recorded magnetic-field and radiometric
values and locations. The magnetic data set presents latitude, longitude,
altitude, and magnetic-field values. Geologic symbols or codes are also
included. The geologic symbols were picked from surficial geologic maps.
The radiometric data set presents latitude, longitude, altitude, geologic
symbols or codes, apparent Uranium (Bismuth 214), Thorium (Thallium 208),
and Potassium (K 40), the element ratios, and ancillary information.

航空磁测（Aeromagnetic）与航空放射测量（Aeroradiometric）数据由航空器搭载的测量仪器沿飞行航线采集，同步记录磁场参数、放射测量值与测点位置信息。其中航空磁测数据集包含纬度、经度、飞行高度、磁场强度值，同时附带地质符号或编码信息。本次使用的地质符号均提取自地表地质图（surficial geologic maps）。航空放射测量数据集则涵盖纬度、经度、飞行高度、地质符号或编码、视铀（Bismuth 214）、视钍（Thallium 208）、钾（K 40）、元素比值及辅助信息。