GSWA North Canning 4 Lagrange Munro 2010 Doserate 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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid.This GSWA North Canning 4 Lagrange Munro 2010 Doserate Grid Geodetic has a cell size of 0.00083 degrees (approximately 90m) and shows the terrestrial dose rate of the Lagrange-Munro, WA, 2010 (North Canning 4). The data used to produce this grid was acquired in 2010 by the WA Government, and consisted of 103921 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射性测量法（又称伽马能谱法）通过采集地表附近的伽马射线自然变化数据，以表征钾（K）、铀（U）及钍（Th）的天然放射性衰变所产生的辐射响应。所采集的数据将通过标准流程进行预处理，以确保记录的辐射响应仅源自地下岩石的放射性衰变。经处理得到的数据集可通过解译揭示地下地质构造特征。经预处理的数据将由GA地球物理学家开展质量校验，以确保GA发布的最终数据符合使用要求。地表剂量率栅格通过对滤波后的钾、铀、钍栅格进行线性组合得到，随后对该栅格施加低通滤波，以生成最终的滤波后地表剂量率栅格。本数据集为西澳地质调查局（GSWA）北坎宁4区拉格朗日-芒罗2010年大地测量剂量率栅格，其栅格单元尺寸为0.00083度（约90米），展示了2010年西澳拉格朗日-芒罗地区（北坎宁4区）的地表剂量率分布。本栅格的数据由西澳州政府于2010年采集完成，总测线长度达103921测线公里，测线间距为400米，飞行离地高度为60米。