VECTOR25 Hydrographic network GWN07

The layer "Hydrographic network" consists of a directionally oriented line network connected to each other with nodes, and of a table without geometry. Those features which are in Switzerland and the Principality of Liechtenstein form the basis for the Swiss Water Information System (GEWISS). GEWISS is managed by the Federal Office for the Environment (FOEN). The layer Hydrographic network has been completely revised within the project GWN07. The release 2007 of VECTOR25 gwn is published as reference.水文网络（Hydrographic network）图层由带节点相互连接的定向线状网络以及无几何属性的数据表构成。位于瑞士及列支敦士登公国境内的此类要素构成了瑞士水信息系统（GEWISS）的基础数据。该系统由联邦环境局（Federal Office for the Environment, FOEN）负责管理。水文网络图层已在GWN07项目中完成全面修订。VECTOR25 gwn的2007版已作为参考数据集发布。