Land use-stratified soil map of Germany at scale 1:1,000,000 - part cropland soils

The Land use-stratified soil map of Germany 1:1,000,000 (BUEK1000N), Version 2.31, part cropland soils, was subdivided according to the main land cover types (forest, cropland and grassland) using the 1990 CORINE Land Cover data. However, it cannot be expected that the legend of this soil map is valid for the CORINE areas (in this project processed as vector data with the resolution of ca. 0,25 km2) rather than for larger patches (ca. 4 km2). Thus, the land cover data had to be generalized. The original land-cover classes were first aggregated into 14 combined classes, then generalized to at least 4 km2 patches, and finally intersected with the soil map units. The unchanged original soil map units were thus geometrically subdivided by land cover. Soil regions, soil landscapes and European climatic zones were also considered in order to stratify the legend of this new digital database. In another working step, the descriptions of the soil legend units were re-written in order to distinguish and to describe typical soil types and soil profiles under forest, cropland and grassland. For that, data from the BGR soil profile data base and from higher resolution soil maps as well as soil profiles from the national forest soil condition monitoring were evaluated. The results are stored in a relational database which is part of the BGR soil information system “FISBo BGR”. An additional, 54-page booklet with explanations for BUEK1000N can be purchased at the GeoCenter Touristik Medien Service GmbH in D-70565 Stuttgart.德国1:100万土地利用分层土壤图（BUEK1000N）版本2.31的农田土壤部分，依托1990年CORINE土地覆盖数据（CORINE Land Cover），按照森林、农田、草地三类主要土地覆盖类型进行细分。然而，该土壤图的图例无法直接适用于CORINE覆盖区域——本项目中该区域数据被处理为分辨率约0.25平方千米的矢量数据——仅适用于面积约4平方千米的更大斑块，因此需对土地覆盖数据进行概化处理：首先将原始土地覆盖类别聚合为14个组合类别，随后将斑块尺寸概化至不小于4平方千米，最后与土壤图单元进行空间相交分析。未做修改的原始土壤图单元由此通过土地覆盖信息完成几何细分。为实现该新型数字数据库图例的分层构建，研究同时纳入了土壤区域、土壤景观以及欧洲气候带等要素。在另一项工作环节中，研究人员重新编写了土壤图例单元的描述内容，以区分并阐述森林、农田与草地覆盖下的典型土壤类型及土壤剖面。为此，研究人员评估了BGR土壤剖面数据库（BGR soil profile database）、高分辨率土壤图数据以及国家森林土壤状况监测项目的土壤剖面数据。最终成果存储于关系型数据库中，该数据库是BGR土壤信息系统“FISBo BGR”的组成部分。此外，可向位于德国斯图加特市D-70565的GeoCenter Touristik Medien Service GmbH购买附带BUEK1000N使用说明的54页手册。