G3Dv3.1 030804, isohypses of base Ld of Onderdale of the Fm of Maldegem

This layer gives the isohypses of the base of the Lid van Onderdale, 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.本图层展示了弗拉芒地下地质三维模型（版本3.1）中定义的翁德代尔层（Lid van Onderdale）基底的等高程线（isohypses）。该地质三维模型由弗拉芒政府与弗拉芒技术研究院（VITO）依据双方管理协议，以VLAKO为项目名称，受弗拉芒环境规划局委托编制完成。