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

This is Version 1 of the Soil Depth product of the Soil and Landscape Grid of Australia. The Soil and Landscape Grid of Australia has produced a range of digital soil attribute products. This depth product estimates the depth of soil down to 2 metres. The digital soil attribute maps are in raster format at a resolution of 3 arc sec (~90 x 90 m pixels). The soil attribute products are provided as continuous maps that represent each of six depth intervals to a maximum depth of 2 metres. We acknowledge that soil depth is variable across Australia, and in some landscapes there might be no soil or soil might be shallower than 2 metres. We have provided continuous maps because of the relative unavailability of data on soil depth. Further, existing data on depth is biased to near surface layers and there are few records that extend beyond 1.5m. Therefore, we provide here, our best estimate of soil depth to allow users to generate masks, which might be used together with the attribute maps to approximate the presence of areas with no soil or areas with shallow soil. We encourage users to draw on local data and expertise for such assessments. Attribute Definition: Depth of soil profile (A & B horizons); Units: metres; Period (temporal coverage; approximately): 1950-2013; Spatial resolution: 3 arc seconds (approx 90m); Total number of gridded maps for this attribute: 3; Number of pixels with coverage per layer: 2007M (49200 * 40800); Total size before compression: about 8GB; Total size after compression: about 4GB; Data license : Creative Commons Attribution 4.0 (CC BY); Target data standard: GlobalSoilMap specifications; Format: GeoTIFF.

本数据集为澳大利亚土壤与景观网格（Soil and Landscape Grid of Australia）土壤深度产品的V1版本。澳大利亚土壤与景观网格已推出一系列数字土壤属性产品。本土壤深度产品估算的是0至2米深度范围内的土壤厚度。该数字土壤属性地图采用栅格（raster）格式，分辨率为3角秒（约90×90米像素）。该土壤属性产品以连续地图形式呈现，涵盖6个深度区间，最大覆盖深度达2米。我们注意到，澳大利亚境内土壤厚度存在显著空间变异性，部分景观区域可能无土壤覆盖，或土壤厚度不足2米。鉴于当前土壤厚度相关数据相对匮乏，我们采用了连续地图的呈现形式。此外，现有土壤深度数据多偏向近地表层，仅有少量记录可延伸至1.5米以下深度。因此，本数据集提供我们所得到的最优土壤厚度估算结果，以便用户生成掩膜（mask），可与属性地图配合使用，以近似估算无土壤覆盖或土壤厚度较浅的区域。我们鼓励用户在开展此类评估时结合本地数据与专业经验。属性定义：土壤剖面（A层与B层）厚度；单位：米；时间覆盖范围（时段）：约1950年至2013年；空间分辨率：3角秒（约90米）；该属性的栅格地图总数：3幅；单图层覆盖像素数：2007M（49200×40800）；压缩前总大小：约8GB；压缩后总大小：约4GB；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：GlobalSoilMap规范；数据格式：GeoTIFF。