Substrate type 19xx

The substrate 19xx layer represents the substrate systematic unit of the peat soils at the time of the initial survey. The substrate systematic unit was derived from old data, translated into the nomenclature according to KA5 and represents a description of the originally mapped substrate type.19xx基质层代表初始调查时期泥炭土（peat soils）的基质系统单元（substrate systematic unit）。该基质系统单元源自旧有数据，依据KA5规范转换为对应命名法（nomenclature），且用于描述原始填绘的基质类型。