Inspire harmonised – Organic C percentage

More information on soil at a given location is often obtained by observations. This layer contains observations of the organic carbon percentage. There are two types of observations: single and multiple observations. In the first case, one parameter corresponds to one measurement value; in the second case, with multiple measuring points and values. A single or multiple observation is always linked to one soil site, one depth interval, one soil site or one soil sample. A soil site, soil site, depth interval or soil sample may have 0 or more observations. There are three different types of single observations: a distinction is made between observations of a numerical value (these are measurements), observations with a free text value (these are observations) and observations categorised by a drop-down list (these are encoded observations). Each of these single observations is characterised by one parameter and one measurement value (either numeric, free text or an item from a drop-down list). Multiple observations are series of measurements – in this case one parameter is described by multiple numerical measurement values. Observations linked to an depth interval or soil sample shall always apply to the full depth of this depth interval or sample. Observations linked to a soil site or a soil site may have 0, one or two depths respectively for observations independent of depth, observations at a certain depth or interval. Observations may, on an optional basis, be linked to an observation method, which describes the method by which the value was determined, for example by referring to the procedure or standard used.通常可通过观测获取特定地点土壤的更多相关信息。本数据集包含有机碳占比（organic carbon percentage）的观测记录。观测共分为两种类型：单次观测与多次观测。单次观测中，单参数对应单一测量值；多次观测则包含多个测点与多组测量值。单次或多次观测均始终关联至一个土壤点位（soil site）、一个深度区间（depth interval）或一份土壤样品（soil sample）。单个土壤点位、深度区间或土壤样品可对应0条或多条观测记录。单次观测共分为三种不同类型：数值型观测（即实测值）、自由文本型观测（即文本记录）以及下拉列表分类观测（编码型观测，encoded observations）。上述各类单次观测均由单参数与单测量值（可为数值、自由文本或下拉列表选项）表征。多次观测为一系列测量值的集合——此类观测中，单参数由多组数值型测量值表征。关联至深度区间或土壤样品的观测，其适用范围始终覆盖该深度区间或样品的全深度范围。关联至土壤点位的观测，可分别对应无深度要求、特定深度或深度区间的场景，对应0个、1个或2个深度参数。观测记录可选择性关联至观测方法（observation method）字段，该字段用于说明测量值的获取方式，例如引用所采用的实验流程或相关标准。