G3Dv3.1 030804, base Ld isohypses from Maldegem Fm mains

This layer gives the isohypes of the base of the Member of Onderdale, 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本图层呈现了法兰德斯地下地质三维模型（版本3.1）中定义的翁德代尔段底面的等高程线（isohypes）。该地质三维模型系受佛兰芒环境规划局委托，依据佛兰芒政府与VITO签订的VLAKO管理协议编制完成。