Background Biogeographical units are widely adopted in ecological research and nature conservation management, even though biogeographical regionalisation is still under scientific debate. The European Environment Agency provided an official map of the European Biogeographical Regions (EBRs), which contains the official boundaries used in the Habitats and Birds Directives. However, these boundaries bisect cells in the official EU 10 km × 10 km grid used for many purposes, including reporting species and habitat data, meaning that 6881 cells overlap two or more regions. Therefore, superimposing the EBRs vector map over the grid creates ambiguities in associating some cells with European Biogeographical Regions. New information To provide an operational tool to unambiguously define the boundaries of the eleven European Biogeographical Regions, we provide a specifically developed raster map of Grid-Based European Biogeographical Regions (GB-EBRs). In this new map, the borders of the EBRs are reshaped to coherently match the standard European 10 km × 10 km grid imposed for reporting tasks by Article 17 of the Habitats Directive and used for many other datasets. We assign each cell to the EBR with the largest area within the cell.

中文翻译：

---

欧洲生物地理区域的基于网格的地图。

背景 生物地理单元在生态研究和自然保护管理中被广泛采用，尽管生物地理区划仍处于科学争论之中。欧洲环境署提供了欧洲生物地理区域 (EBR) 的官方地图，其中包含栖息地和鸟类指令中使用的官方边界。然而，这些边界将欧盟官方 10 公里 × 10 公里网格中的单元一分为二，用于许多目的，包括报告物种和栖息地数据，这意味着 6881 个单元与两个或多个区域重叠。因此，将 EBRs 矢量图叠加在网格上会在将某些单元格与欧洲生物地理区域相关联时产生歧义。新信息 为明确界定 11 个欧洲生物地理区域的边界提供操作工具，我们提供了一个专门开发的基于网格的欧洲生物地理区域 (GB-EBR) 的栅格地图。在这张新地图中，EBR 的边界经过重新调整，以与《栖息地指令》第 17 条为报告任务规定的标准欧洲 10 公里 × 10 公里网格相一致，并用于许多其他数据集。我们将每个单元分配给单元内面积最大的 EBR。