Height grid

The product consists of the two parts Height Grid and Correction Values for the Height Grid: a) Height grid The height grid enables the transformation of orthometric heights in the EVRS (European Vertical Reference System) with reference to Amsterdam in heights of the MGI with reference Adria 1875 (use heights H.ü.A.). B) Correction values for the height grid The correction values for the height grid are used to correct the usage heights contained in the point maps of the position points in order to achieve conformity with the usage heights derived by means of GNSS measurements, geoidundulations and height GRID.本数据集包含两个组成部分：高程格网（Height Grid）与高程格网校正值： a) 高程格网 该高程格网可实现将以阿姆斯特丹为基准的欧洲垂直参考系统（European Vertical Reference System, EVRS）下的正高，转换为以亚得里亚海1875（Adria 1875）为基准的MGI高程（此类高程以H.ü.A.指代）。 b) 高程格网校正值 高程格网校正值用于校正点位图中包含的使用高程，使其与通过全球导航卫星系统（GNSS, Global Navigation Satellite System）测量、大地水准面起伏及高程格网推导得到的使用高程保持一致。