USA SSURGO - Loss Tolerance Factor

Soil loss tolerance factor is the maximum rate of soil loss that will permit crop productivity to be sustained economically and indefinitely on a given soil. Soil loss tolerance is rated as 1, 2, 3, 4 or 5 tons per acre per year. The primary use for soil loss tolerance factor is evaluating the effectiveness of erosion control measures on farmland. Soil loss tolerance factor serves as a quantitative standard to compare to erosion rate estimates from models such as the Revised Universal Soil Loss Equation. Farmlands where soil loss tolerance factor is less than modeled erosion rates are considered unsustainable. Dataset Summary Phenomenon Mapped: Soil loss tolerance Units: tons/acre/year Cell Size: 30 meters Source Type: Discrete Pixel Type: Unsigned integer Data Coordinate System: WKID 5070 USA Contiguous Albers Equal Area Conic USGS version (contiguous US, Puerto Rico, US Virgin Islands), WKID 3338 WGS 1984 Albers (Alaska), WKID 4326 WGS 1984 Decimal Degrees (Guam, Republic of the Marshall Islands, Northern Mariana Islands, Republic of Palau, Federated States of Micronesia, American Samoa, and Hawaii). Projection: Web Mercator Auxiliary Sphere Source: Natural Resources Conservation Service Update Frequency: Annual Publication Date: December 2025 Data from the gNATSGO database was used to create the layer. This layer is derived from the 30m rasters produced by the Natural Resources Conservation Service (NRCS). The value for soil loss tolerance is derived from the gSSURGO component table field T (tfact). The value in this layer is the average value for all components of each map unit weighted by component percent (comppct_r). What can you do with this layer? This layer is suitable for both visualization and analysis acrossthe ArcGIS system. This layer can be combined with your data and other layers from the ArcGIS Living Atlas of the World in ArcGIS Online and ArcGIS Pro to create powerful web maps that can be used alone or in a story map or other application. Because this layer is part of the ArcGIS Living Atlas of the World it is easy to add to your map: In ArcGIS Online, you can add this layer to a map by selecting AddthenBrowse Living Atlas Layers. A window will open. Type "loss tolerance" in the search box and browse to the layer. Select the layer then click Add to Map. In ArcGIS Pro, open a map and selectAdd Datafrom the Map Tab. SelectDataat the top of the drop down menu. The Add Data dialog box will open on the left side of the box, expandPortalif necessary, then selectLiving Atlas. Type "loss tolerance" in the search box, browse to the layer then click OK. In ArcGIS Pro you can use the built-in raster functions or create your own to create custom extracts of the data. Imagery layers provide fast, powerful inputs to geoprocessing tools, models, or Python scripts in Pro. Online you can filter the layer to show subsets of the data using the filter button and the layer"s built-in raster functions. The ArcGIS Living Atlas of the World provides an easy way to explore many other beautiful and authoritative maps on hundreds of topics like this one. Read more in our blogs: Analyzing Soil Capability for Agriculture in the Living Atlas of the World Working with Soil Data from the Living Atlas in ArcGIS Pro Questions? Please leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.土壤流失容忍因子（Soil loss tolerance factor）指在特定土壤上可维持作物经济生产力且长期可持续的最大土壤流失速率。土壤流失容忍值的分级为每年每英亩1、2、3、4或5吨。 土壤流失容忍因子的核心用途为评估农田侵蚀控制措施的有效性。该因子可作为量化标准，与修正通用土壤流失方程（Revised Universal Soil Loss Equation）等模型估算的侵蚀速率进行对比。当农田的土壤流失容忍因子低于模型模拟的侵蚀速率时，该农田被认为是不可持续的。 数据集摘要 映射现象：土壤流失容忍度 单位：吨/英亩/年 像元大小：30米 数据源类型：离散型 像元类型：无符号整数 数据坐标系： 1. WKID 5070 美国本土阿伯斯等面积圆锥投影（美国地质调查局版本，覆盖美国本土、波多黎各、美属维尔京群岛） 2. WKID 3338 WGS 1984 阿伯斯投影（覆盖阿拉斯加） 3. WKID 4326 WGS 1984 十进制度（覆盖关岛、马绍尔群岛共和国、北马里亚纳群岛、帕劳共和国、密克罗尼西亚联邦、美属萨摩亚及夏威夷） 投影：Web墨卡托辅助球体投影 数据来源：美国自然资源保护局（Natural Resources Conservation Service, NRCS） 更新频率：年度更新 发布日期：2025年12月 本图层基于gNATSGO数据库的数据制作，源自美国自然资源保护局（NRCS）生成的30米栅格数据。土壤流失容忍值取自gSSURGO组件表字段T（tfact），本图层的取值为每个制图单元所有组件按组分占比（comppct_r）加权后的平均值。 该图层可应用于哪些场景？ 本图层适用于ArcGIS全生态系统内的可视化与分析工作。可将其与您的自有数据及ArcGIS世界生活地图集（ArcGIS Living Atlas of the World）中的其他图层在ArcGIS Online及ArcGIS Pro中进行融合，制作可独立使用、或用于故事地图及其他应用场景的高性能网络地图。 由于本图层隶属于ArcGIS世界生活地图集，因此可轻松添加至您的地图中： 1. 在ArcGIS Online中：依次选择「添加」→「浏览生活地图集图层」即可将本图层添加至地图。此时将弹出窗口，在搜索框中输入"loss tolerance"，浏览找到目标图层后选中并点击「添加至地图」即可。 2. 在ArcGIS Pro中：打开地图并在「地图」选项卡中选择「添加数据」。在下拉菜单顶部选择「数据」，此时左侧将弹出「添加数据」对话框，如有需要请展开「门户」选项，随后选择「生活地图集」。在搜索框中输入"loss tolerance"，浏览找到目标图层后点击「确定」。 在ArcGIS Pro中，您可使用内置栅格工具或自定义工具对数据进行定制化提取。影像图层可为Pro中的地理处理工具、模型或Python脚本提供高效且高性能的输入数据源。在ArcGIS Online中，您可通过过滤按钮及图层内置的栅格功能筛选图层以展示数据子集。 ArcGIS世界生活地图集提供了便捷途径，可探索数百个主题下的众多优质权威地图，本图层即为其中之一。 您可通过以下博客了解更多信息： - 《在ArcGIS世界生活地图集中分析农业土壤适宜性》 - 《在ArcGIS Pro中使用生活地图集的土壤数据》 如有任何疑问，请在下方留言评论，我们将尽快回复您。