Soil properties as point estimations over the Lithuanian pilot area (2022)

In the context of the EU-funded project DIONE (No. 870378), VNIR topsoil reflectance was captured with DIONE’s Soil Scanning System and transformed through Machine Learning modelling to a set of soil properties that are meaningful for the assessment of soil health. The captured reflectance measurements correspond to locations distributed within the pilot areas of Lithuania and are indicated after the analysis of EO multispectral imagery, aiming to create a collection of point locations that well represent the soil characteristics of the area, and provide valuable information about soil condition through the estimations of the following soil properties: Sand % Clay % Silt % Electrical Conductivity (mS/m) pH Calcium carbonate % Soil Organic Carbon % The dataset is delivered in a shapefile format (DIONE_LT_point_estimations_2022_WP4.shp - EPSG:4326 - WGS 84) containing the following fields: Description of the information contained in the corresponding "LT points estimations" dataset Field Type Description Sample ID String Unique ID Lat Real Latitude Lon Real Longitude Sand Real Sand fraction Clay Real Clay fraction Silt Real Silt fraction EC Real Electrical Conductivity ph_H20 Real ph CaCO3 Real Calcium Carbonate SOC Real Soil Organic Carbon

本数据集依托欧盟资助项目DIONE（项目编号：870378）构建，采用DIONE土壤扫描系统采集可见近红外（VNIR）表层土壤反射光谱数据，并通过机器学习（Machine Learning）建模将光谱数据转换为一系列可用于土壤健康评估的关键土壤属性。
本次采集的反射光谱测量值对应立陶宛试点区域内的分布点位，这些点位通过对地观测（EO）多光谱影像分析筛选得出，旨在构建一套能够充分表征区域土壤特征的点位集合，并通过以下土壤属性的估算值提供关于区域土壤状况的宝贵信息：砂粒百分比、黏粒百分比、粉粒百分比、电导率（Electrical Conductivity，单位：mS/m）、pH值、碳酸钙百分比、土壤有机碳百分比。
本数据集以形状文件（shapefile）格式交付，文件名为DIONE_LT_point_estimations_2022_WP4.shp，采用EPSG:4326坐标系（WGS 84），包含以下字段：
对应"LT点估算数据集"的信息说明如下：
| 字段名 | 数据类型 | 字段说明 |
| ---- | ---- | ---- |
| Sample ID | 字符串（String） | 唯一标识符 |
| Lat | 实数（Real） | 纬度 |
| Lon | 实数（Real） | 经度 |
| Sand | 实数（Real） | 砂粒占比 |
| Clay | 实数（Real） | 黏粒占比 |
| Silt | 实数（Real） | 粉粒占比 |
| EC | 实数（Real） | 电导率 |
| ph_H20 | 实数（Real） | 以水为浸提剂的pH值 |
| CaCO3 | 实数（Real） | 碳酸钙占比 |
| SOC | 实数（Real） | 土壤有机碳占比 |