G3Dv3.1 030805, prevention of Ld van Ursel from the Fm van Maldegem

This layer gives the occurrence limits of the Member of Ursel, 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.本图层明确了弗拉芒地下三维地质模型（版本3.1）中定义的厄瑟尔段（Ursel Member）的赋存边界。该三维地质模型由弗拉芒环境规划局委托，依托弗拉芒政府与VITO签署的管理协议框架，以VLAKO项目之名编制完成。