G3Dv3 06 and 07, occurrence of Trias and Perm

This layer gives the limits of prevention of the Trias and Perm, as defined in the Geological 3D model of the Flemish subsoil. The Geological 3D model was drawn up under the Flemish Government’s management agreement with VITO, known as VLAKO, on behalf of the Flemish Planning Bureau for Environment该图层明确了弗拉芒地下地质三维模型中所定义的三叠系（Trias）与二叠系（Perm）的防控边界。本地质三维模型系以弗拉芒环境规划局的名义，在弗拉芒政府与VITO签署的VLAKO管理协议框架下编制完成。