Georeferenced point data of soil properties in the Netherlands

This dataset contains georeferenced point data of basic soil properties in the Netherlands from the "Bodemkundig Informatie Systeem" (BIS), the national soil database of the Netherlands. It includes soil point data of clay content [%], silt content [%], sand content [%], bulk density (BD) [g/cm3], soil organic matter (SOM) [%], pH [KCl], total N (Ntot) [mg/kg], oxalate-extractable P (Pox) [mmol/kg] and cation exchange capacity (CEC) [mmol(c)/kg]. All of the soil properties were measured with conventional laboratory methods. In addition to the laboratory measurements, there are also field estimates made by soil surveyors for clay, BD and SOM. All laboratory measurements are part of the "Profielbeschrijving" (PFB) dataset of BIS. Field estimates for clay, BD and SOM are mostly from the "Boring Bodemkundige paket" (BPK) dataset of BIS, as well as some from the PFB dataset. Field estimates from PFB for which there was a laboratory measurement available from the same location and depth were removed from the dataset. All soil laboratory measurements and field estimates were collected by taking soil samples in the field. Soil samples were taken by genetic soil horizons from depths between 0-2 m, excluding the humus/litter/O horizon layer between 1953-2023.<br>Tabular datasets of each georeferenced soil property point data are provided as separate CSV files for each soil property. The soil point data cover the entire Netherlands (national scale) and the spatial projection of the provided X and Y coordinates is EPSG:28992 (Amersfoort / RD New), which is the national projection most commonly used in the Netherlands.<br>All laboratory measurements of all 9 soil properties can be viewed at bodemdata.nl under "Profielbeschrijvingen met analyses". All field estimates can be viewed via the same link under "Profielbeschrijvingen". Here you can also find additional metadata and information of soil properties not included in this dataset. Part of the BIS is also part of the National Key registry of the Subsurface (BRO) of the Netherlands. For more information on subsurface data in the Netherlands you can also see this detailed manual.

本数据集包含来自荷兰国家土壤数据库Bodemkundig Informatie Systeem（BIS）的荷兰境内基础土壤属性地理参考点数据。
本数据集涵盖黏粒含量[%]、粉粒含量[%]、砂粒含量[%]、容重（BD）[g/cm³]、土壤有机质（SOM）[%]、氯化钾浸提pH值、全氮（Ntot）[mg/kg]、草酸浸提态磷（Pox）[mmol/kg]以及阳离子交换量（CEC）[mmol(c)/kg]。所有土壤属性均采用常规实验室方法测定。
除实验室测定数据外，本数据集还包含土壤调查人员针对黏粒、容重及土壤有机质的野外估算值。所有实验室测定数据均隶属于BIS的Profielbeschrijving（PFB）数据集；而黏粒、容重及土壤有机质的野外估算值主要来源于BIS的Boring Bodemkundige paket（BPK）数据集，另有部分来自PFB数据集。对于PFB数据集中同一地点同深度同时具备实验室测定值的野外估算记录，已从本数据集中剔除。
所有土壤实验室测定数据与野外估算值均通过野外采集土样获得，土样按发生学土壤发生层采集，采样深度介于0~2米之间，且不包含腐殖质/枯落物/O层，采样时段为1953-2023年。
每种地理参考土壤属性的点数据均以单独的CSV文件提供。本土壤点数据覆盖荷兰全境（国家尺度），所提供的X、Y坐标采用EPSG:28992（Amersfoort / RD New）投影，该投影为荷兰最常用的国家坐标系。
可通过bodemdata.nl网站的“Profielbeschrijvingen met analyses”栏目查看全部9项土壤属性的实验室测定数据；野外估算值可通过同一链接下的“Profielbeschrijvingen”栏目查询。此外，该网站还提供本数据集未涵盖的额外元数据及其他土壤属性相关信息。
BIS的部分数据同时隶属于荷兰国家地下关键登记库（BRO）。如需了解荷兰地下数据的更多信息，可参阅该详细手册。