Geodetic Reference Systems — Geodetic Base Network Points (GGP)

The Geodetic Basic Network Points (GGP) serve the physical realisation and security of the ETRS89 as well as its connection with the height and gravity reference frame, thus forming the backbone/backup of the geodetic spatial reference in Schleswig-Holstein.

大地基准网点（Geodetic Basic Network Points，简称GGP）承担欧洲大地参考系1989（ETRS89）的物理实现与安全保障职能，同时负责该参考系与高程、重力参考框架的衔接工作，由此构成石勒苏益格-荷尔斯泰因地区大地空间参考系统的骨干与备份支撑。