St George percent potassium grid geodetic

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.This radiometric potassium grid has a cell size of 0.00021 degrees (approximately 22m) and shows potassium element concentration of the SMMSP - MagSpec - St George, Qld, 2001 in units of percent (or %). The data used to produce this grid was acquired in 2001 by the QLD Government, and consisted of 61110 line-kilometres of data at a line spacing between 100m and 400m, and 60m terrain clearance.

放射性测量法（radiometric method），又称伽马射线能谱法（gamma-ray spectrometric method），可检测地球表面附近的伽马射线自然变化，该变化源于钾（K）、铀（U）与钍（Th）的天然放射性衰变。所采集的数据将通过标准化流程进行处理，以确保记录的辐射响应仅源自地下岩石。经处理后得到的数据集可通过解译揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据满足使用需求。
本放射性钾元素格网的单元格尺寸为0.00021度（约22米），展示了2001年昆士兰州（QLD）圣乔治（St George）地区SMMSP-MagSpec项目的钾元素浓度数据，单位为百分比（%）。
本格网所用数据由昆士兰州（QLD）政府于2001年采集，总测线长度达61110线公里，测线间距介于100米至400米之间，飞行离地高度为60米。