Digital soil suitability map of Switzerland - Cultivated land

On the soil suitability map, each mapping unit has a code consisting of an uppercase letter and a number. The letters stand for 25 different physiographical units. The numbers represent different elements of the landscape, categorised by bedrock, slope and gradient. Each mapping unit also corresponds to one or more soil types. There are 144 mapping units in total. They are grouped together into 18 different coloured categories on the map from the perspective of soil suitability. Agricultural criteria have primarily been used for this classification.在土壤适宜性地图中，每个制图单元（mapping unit）均拥有由大写字母与数字组合而成的编码。其中字母代表25种不同的自然地理单元（physiographical units），数字则代表依据基岩、坡度与坡降划分的不同景观要素。每个制图单元同时对应一种或多种土壤类型。该地图总计包含144个制图单元，从土壤适宜性评价的视角出发，这些制图单元在地图上被划分为18个不同的色彩类别。本次分类主要以农业标准作为核心依据。