GSWA Boorabbin Lake Johnston Elevation Grid Geodetic

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This GSWA Boorabbin Lake Johnston Elevation Grid Geodetic is elevation data for the Boorabbin-Lake Johnston merge, 1987-2005. This survey was acquired under the project No. 1331 for the geological survey of WA. The grid has a cell size of 0.0005 degrees (approximately 51m). This grid contains the ground elevation relative to the geoid for the Boorabbin-Lake Johnston merge, 1987-2005. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

数字高程数据（Digital Elevation Data）记录了地球物理勘探过程中采集的经处理点位或线状测点数据所反映的地形高程变化。本西澳地质调查局（Geological Survey of Western Australia，GSWA）布尔宾-约翰斯顿湖高程大地测量网格数据集为1987-2005年布尔宾与约翰斯顿湖合并区域的高程数据，本次勘探系为西澳州地质调查项目编号1331开展采集工作。该格网的单元尺寸为0.0005度（约51米），涵盖1987-2005年布尔宾-约翰斯顿湖合并区域内相对于大地水准面的地面高程数据，其数值代表地球表面任意点位至大地水准面的垂直距离，数据单位为米。经处理后的数据集已由澳大利亚地球科学局（Geoscience Australia，GA）地球物理学家完成质量核查，以确保GA发布的最终数据满足使用要求。