Soil and Landscape Grid National Soil Attribute Maps - Pedogenons (3" resolution) - Release 1

This map gives a modelled estimate of the spatial distribution of Pedogenon soil classes across Australia.

Pedogenon mapping is a method for stratifying the landscape (similar to soil-landscape units), which can be used to assess past soil change with a space-for-time substitution approach.

Pedogenon classes are a conceptual taxa that aim to define groups of homogeneous environmental variables. These groups are created applying unsupervised classification to a set of state variables, proxies of the soil-forming factors for a given reference time. The assumption is that the soil-forming processes within these classes (i.e., pedogenons) have been relatively similar over pedogenetic time and thus have developed soils with similar properties. Pedogenon classes can afterwards be divided into subclasses along a gradient from less (i.e., remnant pedogenons) to more anthropogenic pressure on soils (i.e., pedophenons), in an analogous way to the concept of genoform and phenoform (Rossiter and Bouma, 2018). The assessment of changes in soil condition can be done with a space for time substitution within and across pedogenon classes. The conceptualization and methodology for pedogenon mapping and using the classes as basis to assess changes in soil condition are explained with more detail in two publications (Román Dobarco et al., 2021a; Román Dobarco et al., 2021b).

Detailed information about the Soil and Landscape Grid of Australia can be found at - SLGA.

Period (temporal coverage; approximately): 1950-2022;
Spatial resolution: 3 arc seconds (approx 90 m);
Number of pixels with coverage per layer: 2007M (49200 * 40800);
Data license : Creative Commons Attribution 4.0 (CC BY);
Target data standard: GlobalSoilMap specifications;
Format: Cloud Optimised GeoTIFF;

本地图对澳大利亚全境Pedogenon土壤类别的空间分布进行了模拟估算。

Pedogenon制图法是一种景观分层方法（类似于土壤-景观单元），可通过空间替代时间法评估历史土壤变化。

Pedogenon类别是一类概念性分类单元，旨在划分具有均质环境变量的群组。此类群组通过对一系列状态变量进行无监督分类得到，这些状态变量为给定参考时间下土壤形成因素的代用指标。其核心假设为：此类别（即Pedogenon）内的成壤过程在成壤时间尺度上相对一致，因此发育出的土壤具有相似属性。随后，Pedogenon类别可依据土壤受人为压力的梯度划分为亚类：人为压力较低的（即残留Pedogenon）与人为压力较高的（即Pedophenon），该逻辑与成因形态（genoform）和表观形态（phenoform）的概念类似（Rossiter与Bouma，2018）。可在Pedogenon类别内部及类别之间采用空间替代时间法开展土壤状况变化评估。有关Pedogenon制图法的概念框架、方法流程，以及以该类别为基础开展土壤状况变化评估的详细内容，已在两篇文献中进行了阐述（Román Dobarco等，2021a；Román Dobarco等，2021b）。

有关澳大利亚土壤与景观网格（Soil and Landscape Grid of Australia，SLGA）的详细信息可通过SLGA查询获取。

时间覆盖范围：约1950年—2022年；
空间分辨率：3角秒（约90米）；
单图层覆盖像素数：2007M（49200 × 40800）；
数据许可协议：知识共享署名4.0（Creative Commons Attribution 4.0，CC BY）；
目标数据标准：全球土壤图（GlobalSoilMap）规范；
数据格式：云优化GeoTIFF（Cloud Optimised GeoTIFF）；