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

This is Version 1 of the Australian Soil Total Nitrogen 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. Each product contains six digital soil attribute maps, and their upper and lower confidence limits, representing the soil attribute at six depths: 0-5cm, 5-15cm, 15-30cm, 30-60cm, 60-100cm and 100-200cm. These depths are consistent with the specifications of the GlobalSoilMap.net project (http://www.globalsoilmap.net/). The digital soil attribute maps are in raster format at a resolution of 3 arc sec (~90 x 90 m pixels).

These maps are generated by combining the best available Digital Soil Mapping (DSM) products available across Australia.

Attribute Definition: Total nitrogen;
Units: %;
Period (temporal coverage; approximately): 1950-2013;
Spatial resolution: 3 arc seconds (approx 90m);
Total number of gridded maps for this attribute: 18;
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）出品的澳大利亚土壤全氮产品V1版本。

澳大利亚土壤与景观网格已推出一系列数字化土壤属性产品。每款产品均包含六组数字化土壤属性地图及其上下置信限，分别对应六个土壤深度层级：0-5cm、5-15cm、15-30cm、30-60cm、60-100cm及100-200cm。该深度划分标准与GlobalSoilMap.net项目（http://www.globalsoilmap.net/）的规范保持一致。此类数字化土壤属性地图采用栅格格式，分辨率为3角秒（约90×90米像素）。

此类地图通过整合澳大利亚境内现有最优的数字化土壤制图（Digital Soil Mapping, DSM）产品生成。

属性定义：全氮；
单位：%；
时间覆盖范围：约1950年—2013年；
空间分辨率：3角秒（约90米）；
该属性的栅格地图总数：18幅；
单图层有效像素数：2007M（49200×40800）；
压缩前总容量：约8GB；
压缩后总容量：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。