GSV Murray Basin Horsham Vic pot tho ura totg 4band radiometric grid geodetic

This GSV Murray Basin Horsham Vic pot tho ura totg 4band radiometric grid geodetic is an airborne-derived radiometric Potassium, Thorium and Uranium data over a sun shaded total count radiometric data for the Murray Basin - Horsham, Vic, 1980 (GSV0193). 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 uranium (K), uranium (U) and uranium (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 GSV Murray Basin Horsham Vic pot tho ura totg 4band radiometric grid geodetic has a cell size of 0.0005 degrees (approximately 50m). The data used to produce this grid was acquired in 1980 by the VIC Government, and consisted of 71729 line-kilometres of data at 250m line spacing and 80m terrain clearance. The grid was produced by applying the colours red to the Potassium ground concentration, green to the Thorium concentration and blue to the Uranium concentration. The colours were clipped to a 99% linear scale. These colours were transparent over a shaded Total Count. This clipping will necessarily introduce some artefacts into the ratio grids in areas of very low radioelement concentrations. The 3-band image was superposed on the sun shaded TC grid of the same survey to produce the final image.

本数据集为1980年维多利亚州（VIC）默里盆地-霍舍姆地区的大地坐标系4波段放射测量（radiometric）网格数据（编号GSV0193），涵盖机载获取的钾（Potassium, K）、钍（Thorium, Th）、铀（Uranium, U）放射测量数据，以及该区域的阴影化总计数放射测量数据。
放射测量（又称伽马射线能谱测量，gamma-ray spectrometric）方法可检测地表附近因钾（K）、铀（U）和钍（Th）的自然放射性衰变产生的伽马射线自然变化。所采集的数据通过标准化流程开展处理，确保记录的响应仅源于地下岩石。最终生成的数据集可通过解译揭示地下地质构造。经处理的数据已由GA的地球物理学家进行质量核查，确保GA发布的最终数据满足使用需求。
该4波段放射测量网格数据的格网单元尺寸为0.0005度（约50米）。用于生成该网格的数据由维多利亚州政府于1980年采集，总测线公里数达71729，测线间距为250米，飞行离地高度为80米。该网格采用颜色编码方案：将红色映射至钾元素地面浓度，绿色映射至钍元素浓度，蓝色映射至铀元素浓度。颜色映射范围被裁剪至99%线性比例尺区间。上述颜色图层在阴影化总计数图层上设置为透明。该裁剪操作不可避免地会在放射元素浓度极低区域的比值网格中引入伪影。将该3波段影像叠加至本次测量的阴影化总计数网格，即可得到最终成果影像。