中国高分辨率国家土壤信息格网基本属性数据集_90米土壤阳离子交换量（2010-2018）

本数据集是全国范围的土壤阳离子交换量高分辨率空间分布图。水平空间分辨率为90m，垂直方向包括六个土层深度：0-5, 5-15, 15-30, 30-60, 60-100, 100-200cm。该数据集是基于近年“我国土系调查与《中国土系志》编制项目”获得的土壤剖面样点，采用预测性土壤制图范式，利用地理信息与遥感技术对成土环境条件进行精细刻画和空间分析，研发自适应深度函数拟合方法，集成先进的集合式机器学习方法，生成了中国高分辨率系列土壤属性三维数字分布图及其不确定性分布。与现有土壤图和相关土壤数据集相比，显著提高了准确性和精细度，更好地表征了我国土壤属性的空间变异特征，可广泛应用于土壤、农业、生态、水文、气候、环境等多个学科领域，也是对“全球土壤制图科学计划”（GlobalSoilMap.net）的重要贡献。

This dataset is a high-resolution spatial distribution map of soil cation exchange capacity (CEC) at the national scale of China. Its horizontal spatial resolution is 90 meters, and the vertical dimension covers six soil layer depths: 0–5, 5–15, 15–30, 30–60, 60–100, and 100–200 cm. This dataset was developed based on soil profile sampling points obtained from the recent "National Soil Series Survey and Compilation of the Soil Series of China" project. Adopting the predictive soil mapping paradigm, it uses geographic information and remote sensing technologies to conduct fine characterization and spatial analysis of soil-forming environmental conditions, develops an adaptive deep function fitting method, and integrates advanced ensemble machine learning methods to produce three-dimensional digital distribution maps of high-resolution series of soil properties in China as well as their uncertainty distributions. Compared with existing soil maps and related soil datasets, this work significantly improves accuracy and resolution, better characterizes the spatial variability of soil properties in China, and can be widely applied to multiple disciplines including soil science, agriculture, ecology, hydrology, climatology, and environmental science. It also represents an important contribution to the "Global Soil Mapping Science Initiative" (GlobalSoilMap.net).