AUSGeoid98 v.1.0 data files: (sj53-15)
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https://researchdata.edu.au/ausgeoid98-v10-files-sj53-15/3418074
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AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.
AUSGeoid98数据文件包含覆盖澳大利亚全域的2分钟格网AUSGeoid98数据集,可用于对指定点位的大地水准面高(geoid-ellipsoid separation)进行插值计算。您可使用自行开发的插值软件,亦可使用澳大利亚地球科学局(Geoscience Australia)推出的Windows版插值工具Winter。
该类数据文件为标准格式文本,覆盖范围与标准地形图幅完全一致。当前可获取两种比例尺地形图幅对应的数据文件:1:250 000(约100×150 km)与1:1 000 000(约400×600 km)。每个图幅的四周均设有4分钟的重叠区域。
数据格式说明:每个AUSGeoid98数据文件的起始位置均包含头部记录,以此与已被取代的AUSGeoid93数据文件区分开。AUSGeoid98数据文件将大地水准面高精确至小数点后三位,而已被取代的AUSGeoid93数据文件仅精确至小数点后两位。AUSGeoid98的垂线偏差(deflections of the vertical)基于大地水准面曲面计算得到,而AUSGeoid93的垂线偏差则基于OSU91A模型计算得到。
提供机构:
Geoscience Australia



