USA SSURGO - Farmland Class

The Farmland Protection Policy Act, part of the 1981 Farm Bill, is intended to limit federal activities that contribute to the unnecessary conversion of farmland to other uses. The law applies to construction projects funded by the federal government such as highways, airports, and dams, and to the management of federal lands. As part of the implementation of this law, the Natural Resources Conservation Service identifies high quality agricultural soils as prime farmland, unique farmland, and land of statewide or local importance. Each category may contain one or more limitations such as Prime Farmland if Irrigated. For more information of farmland classification see the National Soil Survey Handbook. Dataset Summary Phenomenon Mapped: Farmland Geographic Extent: Contiguous United States, Alaska, Hawaii, Puerto Rico, Guam, US Virgin Islands, Northern Mariana Islands, Republic of Palau, Republic of the Marshall Islands, Federated States of Micronesia, and American Samoa. Projection: Web Mercator Auxiliary Sphere 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). Units: Classes Cell Size: 30 meters Source Type: Discrete Pixel Type: Unsigned integer 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 farmland class is derived from the gSSURGO map unit table field Farm Class(farmlndcl). 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. 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 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 Add then Browse Living Atlas Layers. A window will open. Type "farmland" in the search box and browse to the layer. Select the layer then click Add to Map. In ArcGIS Pro, open a map and select Add Data from the Map Tab. Select Data at the top of the drop down menu. The Add Data dialog box will open on the left side of the box, expand Portal if necessary, then select Living Atlas. Type "farmland" 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. The ArcGIS Living Atlas of the World provides an easy way to explore many otherbeautiful and authoritative maps on hundreds of topics like this one. Data Dictionary "All areas are prime farmland" 1; "Farmland of local importance" 2; "Farmland of statewide importance" 3; "Farmland of statewide importance, if drained" 4; "Farmland of statewide importance, if drained and either protected from flooding or not frequently flooded during the growing season" 5; "Farmland of statewide importance, if irrigated" 6; "Farmland of statewide importance, if irrigated and drained" 7; "Farmland of statewide importance, if irrigated and either protected from flooding or not frequently flooded during the growing season" 8; "Farmland of statewide importance, if irrigated and reclaimed of excess salts and sodium" 9; "Farmland of statewide importance, if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60" 10; "Farmland of statewide importance, if protected from flooding or not frequently flooded during the growing season" 11; "Farmland of statewide importance, if warm enough" 12; "Farmland of statewide importance, if warm enough, and either drained or either protected from flooding or not frequently flooded during the growing season" 13; "Farmland of unique importance" 14; "Not prime farmland" 15; "Prime farmland if drained" 16; "Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season" 17; "Prime farmland if irrigated" 18; "Prime farmland if irrigated and drained" 19; "Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season" 20; "Prime farmland if irrigated and reclaimed of excess salts and sodium" 21; "Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60" 22; "Prime farmland if protected from flooding or not frequently flooded during the growing season" 23; "Prime farmland if subsoiled, completely removing the root inhibiting soil layer" 24; "Farmland of local importance, if irrigated" 25" 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.《农田保护政策法案》（Farmland Protection Policy Act）是1981年《农业法案》的组成部分，旨在限制联邦政府活动导致农田被不必要地转换为其他用途。该法案适用于由联邦政府资助的建设项目，如高速公路、机场和水坝，以及联邦土地的管理工作。作为该法案实施的一部分，自然资源保护服务局（Natural Resources Conservation Service，NRCS）将优质农业土壤划分为优质农田、特殊农田以及具有全州或地方重要性的农田。每个类别可能包含一项或多项限定条件，例如“灌溉条件下的优质农田”。有关农田分类的更多信息，请参阅《国家土壤调查手册》（National Soil Survey Handbook）。 ### 数据集摘要 #### 映射现象：农田 #### 地理覆盖范围：美国本土、阿拉斯加、夏威夷、波多黎各、关岛、美属维尔京群岛、北马里亚纳群岛、帕劳共和国、马绍尔群岛共和国、密克罗尼西亚联邦和美属萨摩亚。 #### 投影：Web墨卡托辅助球体 #### 数据坐标系：WKID 5070 美国本土阿尔伯斯等面积圆锥投影（美国本土、波多黎各、美属维尔京群岛）；WKID 3338 WGS 1984 阿尔伯斯投影（阿拉斯加）；WKID 4326 WGS 1984 十进制度（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）。 #### 单位：类别 #### 像元大小：30米 #### 源类型：离散 #### 像素类型：无符号整数 #### 数据来源：自然资源保护服务局（NRCS） #### 更新频率：每年 #### 发布日期：2025年12月 本图层基于gNATSGO数据库制作，源自自然资源保护服务局（NRCS）生成的30米栅格数据。农田类别的数值源自gSSURGO地图单元表中的Farm Class（farmlndcl）字段。 ### 图层用途 本图层适用于ArcGIS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）中的其他图层结合，在ArcGIS Online和ArcGIS Pro中创建功能强大的网页地图，可单独使用，亦可嵌入故事地图或其他应用程序。更多详情请参阅官方博客文章：《在ArcGIS世界生活地图集中分析农业土壤适宜性》《在ArcGIS Pro中使用世界生活地图集的土壤数据》。 由于本图层隶属于ArcGIS世界生活地图集（ArcGIS Living Atlas of the World），添加至地图的操作十分便捷： 1. 在ArcGIS Online中，可通过依次选择“添加”>“浏览生活地图集图层”将本图层添加至地图。此时将弹出窗口，在搜索框中输入"farmland"并浏览至目标图层，选中后点击“添加至地图”即可。 2. 在ArcGIS Pro中，打开地图并选择“地图”选项卡中的“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，若需展开门户（Portal）则执行相应操作，随后选择“生活地图集”，在搜索框中输入"farmland"并浏览至目标图层，点击“确定”即可。 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ArcGIS Pro中的地理处理工具、模型及Python脚本提供高效便捷的输入源。ArcGIS世界生活地图集（ArcGIS Living Atlas of the World）提供了便捷途径，可让您探索涵盖数百个主题的众多优质权威地图，本图层即为其中之一。 ### 数据字典 1：全域均为优质农田 2：具有地方重要性的农田 3：具有全州重要性的农田 4：经过排水处理后具有全州重要性的农田 5：经过排水处理，且在生长季免受洪涝影响或不频繁发生洪涝的条件下，具有全州重要性的农田 6：灌溉条件下具有全州重要性的农田 7：灌溉且经过排水处理后具有全州重要性的农田 8：灌溉且在生长季免受洪涝影响或不频繁发生洪涝的条件下，具有全州重要性的农田 9：灌溉且经改良去除过量盐分和钠后具有全州重要性的农田 10：灌溉且土壤可蚀性因子I×气候因子C不超过60的条件下，具有全州重要性的农田 11：在生长季免受洪涝影响或不频繁发生洪涝的条件下，具有全州重要性的农田 12：温度条件适宜的情况下具有全州重要性的农田 13：温度条件适宜，且经过排水处理，或在生长季免受洪涝影响、不频繁发生洪涝的条件下，具有全州重要性的农田 14：具有特殊重要性的农田 15：非优质农田 16：经过排水处理后为优质农田 17：经过排水处理，且在生长季免受洪涝影响或不频繁发生洪涝的条件下为优质农田 18：灌溉条件下为优质农田 19：灌溉且经过排水处理后为优质农田 20：灌溉且在生长季免受洪涝影响或不频繁发生洪涝的条件下为优质农田 21：灌溉且经改良去除过量盐分和钠后为优质农田 22：灌溉且土壤可蚀性因子I×气候因子C不超过60的条件下为优质农田 23：在生长季免受洪涝影响或不频繁发生洪涝的条件下为优质农田 24：经过深松处理，完全破除阻碍根系生长的土层后为优质农田 25：灌溉条件下具有地方重要性的农田 如有疑问，请在下方留言，我们将尽快为您解答。