Geodetic reference systems — trigonometric fixed points (position points)

The German Main Triangle Network (DHDN) described nationwide and
nationwide through the trigonometric points (TP) the reference system for the
Location.
Today, the geodetic basic network points realise the position reference system and the position reference is provided by SAPOS® satellite-based.
The existing TP network is no longer maintained in Schleswig-Holstein, but the location points are still maintained in AFIS.

德国主三角网（German Main Triangle Network，DHDN）通过三角点（trigonometric points，TP）构建了覆盖全国的位置参考系统。如今，大地基准网点承载了该位置参考体系，位置参考服务由基于卫星的SAPOS®提供。石勒苏益格-荷尔斯泰因州境内的现有三角点网络已不再维护，但该区域内的位置点仍由AFIS负责维护。