【摘要】 基于鄂北地区水资源配置工程的实测数据,采用EGM2008模型计算高程异常并用SRTM1模型进行地形改正,通过残差分析,发现残差具有极强的系统性和趋势性。将趋势项移除后,对残差进行拟合,最后提出适合于该区域的最佳模型,其外符合精度达到了1.01 cm。其中,100%的点高程精度可达到三等水准要求,52.9%的点高程精度可达到二等水准要求。更多还原

【Abstract】 In this paper,we used the EGM2008 model to calculate the elevation anomaly and the SRTM1 model to correct the topographic data of the water resources allocation project in north Hubei Province.According to the results of residual analysis,the residual error was highly systematic and tendentious.After removing the trend term,the residual could be fitted.Finally,we proposed the best model which was suitable for this area.The accuracy of the model is up to 1.01 cm.Among them,the elevation accuracy of 100% points can meet the requirements of third-order leveling,52.9% of them can meet the second-order leveling requirements.更多还原