G3Dv3.1 020802, isohypes of top Ld of Houthal of the Fm of Bolderberg outside the Roerdalslenk

This layer gives the isohypes of the top of the Houthal Member, as defined in the Geological 3D model of the Flemish Subsoil – version 3.1. 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本图层展示了弗拉芒地下地质3D模型（版本3.1）中定义的胡塔尔段（Houthal Member）顶面等高程线（isohypes）。该地质3D模型受弗拉芒环境规划局委托，依据弗拉芒政府与VITO签署的VLAKO管理协议编制完成。