G3Dv3.1 0314, prevention of Fm van Tielt and Hyon

This layer gives the limits of occurrence of the formations of Tielt and Hyon, as defined in the Geological 3D model of the Flemish subsurface - version 3.1. The Geological 3D model was drawn up in the framework of the management agreement of the Flemish government with VITO, under the name VLAKO, on behalf of the Flemish Environmental Planning Bureau.本图层划定了蒂尔特（Tielt）组与永（Hyon）组地层的赋存边界，该划分依据法兰德斯地下地质三维模型（版本3.1）中的相关定义。上述地质三维模型系受法兰德斯环境规划局委托，以VLAKO为项目名称，依托法兰德斯政府与VITO签署的管理协议框架编制完成。