AUSGeoid98 v.1.0 data files: Mount Solitaire (sf52-04)

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 Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places.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.澳大利亚大地水准面1998模型（AUSGeoid98）数据文件包含以2分网格形式存储的、覆盖澳大利亚全域的数据集，可用于对所需点位的大地水准面-椭球面间距开展插值计算。用户可选用自研插值软件，或澳大利亚地球科学局（Geoscience Australia）推出的Windows插值工具Winter。 该类数据文件采用标准文本格式，覆盖范围与标准地形图幅完全匹配。现有数据文件覆盖1:25万（约100×150千米）及1:100万（约400×600千米）两种比例尺的地形图幅，各图幅的四周均设有4分的重叠区域。 数据格式说明：AUSGeoid98数据文件的每个文件起始处均包含头记录，用于与已被取代的澳大利亚大地水准面1993模型（AUSGeoid93）数据文件进行区分。AUSGeoid98数据文件可将大地水准面-椭球面间距精确至小数点后三位，而已被取代的AUSGeoid93数据文件仅能精确至小数点后两位。 AUSGeoid98的垂线偏差由大地水准面-椭球面间距曲面计算得出，而AUSGeoid93的垂线偏差则基于OSU91A模型计算得到。