GSWA Crossland Noonkanbah East Canning 1 GA Canning Basin Onshore 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 Crossland Noonkanbah East Canning 1 GA Canning Basin Onshore Doserate Grid Geodetic has a cell size of 0.00083 degrees (approximately 90m) and shows the terrestrial dose rate of the Crossland-Noonkanbah-East Canning Onshore merge, 2007-2009. The data used to produce this grid was acquired in 2007 by the WA Government, and consisted of 197185 line-kilometres of data at a line spacing between 400m and 800m, and 60m terrain clearance.

放射性测量法，亦称伽马射线能谱法（gamma-ray spectrometric method），通过采集地表附近的伽马射线自然变化数据，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处理，以确保所记录的辐射响应仅由地下岩石引发。经处理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查，以确保GA发布的最终数据符合使用需求。
地表剂量率网格（terrestrial dose rate grid）通过滤波后的钾、铀、钍网格的线性组合生成，随后对该网格施加低通滤波器（low pass filter），得到滤波后的地表剂量率网格。
本GSWA Crossland Noonkanbah East Canning 1 GA Canning Basin Onshore Doserate Grid Geodetic数据集的网格单元尺寸为0.00083度（约90米），用于展示2007-2009年克罗斯兰-努坎巴东坎宁陆上合并区域的地表剂量率分布。本网格所用数据由西澳大利亚州政府于2007年采集，总测线长度达197185千米，测线间距介于400米至800米之间，飞行离地高度为60米。