Soils Agate-Winlo

The DSL SWI Soils dataset represents two selected subsets of the USDA NRCS gNATSGO dataset for Oregon. The “SWI Predominantly Hydric Soil Map Units” layer represents soil map units that are comprised of greater than 50 percent hydric soil components. The Agate-Winlo Soil Map Units layer is associated with vernal pools in Jackson County. These two subsets indicate areas where unmapped wetlands may be present for the purpose of planning, scoping projects, and coordination with DSL.The gridded National Soil Survey Geographic Database (gNATSGO) is a USDA-NRCS-SPSD composite database that provides complete coverage of the best available soils information for all areas of the United States and Island Territories. It was created by combining data from the Soil Survey Geographic Database (SSURGO), State Soil Geographic Database (STATSGO2), and Raster Soil Survey Databases (RSS) into a single seamless ESRI file geodatabase.Consult the gNATSGO home page for more information: https://www.nrcs.usda.gov/resources/data-and-reports/gridded-national-soil-survey-geographic-database-gnatsgo and the web soil survey: http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm.NRCS description of SSURGO Database:The SSURGO database contains information about soil as collected by the National Cooperative Soil Survey over the course of a century. The information can be displayed in tables or as maps and is available for most areas in the United States and the Territories, Commonwealths, and Island Nations served by the USDA-NRCS. The information was gathered by walking over the land and observing the soil. Many soil samples were analyzed in laboratories. The maps outline areas called map units. The map units describe soils and other components that have unique properties, interpretations, and productivity. The information was collected at scales ranging from 1:12,000 to 1:63,360. More details were gathered at a scale of 1:12,000 than at a scale of 1:63,360. The mapping is intended for natural resource planning and management by landowners, townships, and counties. Some knowledge of soils data and map scale is necessary to avoid misunderstandings.The maps are linked in the database to information about the component soils and their properties for each map unit. Each map unit may contain one to three major components and some minor components. The map units are typically named for the major components. Examples of information available from the database include available water capacity, soil reaction, electrical conductivity, and frequency of flooding; yields for cropland, woodland, rangeland, and pastureland; and limitations affecting recreational development, building site development, and other engineering uses.SSURGO datasets consist of map data, tabular data, and information about how the maps and tables were created. The extent of a SSURGO dataset is a soil survey area, which may consist of a single county, multiple counties, or parts of multiple counties. SSURGO map data can be viewed in the Web Soil Survey or downloaded in ESRI® Shapefile format. The coordinate systems are Geographic. Attribute data can be downloaded in text format that can be imported into a Microsoft® Access® database.https://www.nrcs.usda.gov/resources/data-and-reports/soil-survey-geographic-database-ssurgoNRCS description of STATSGO2 Database:The Digital General Soil Map of the United States or STATSGO2 is a broad-based inventory of soils and non-soil areas that occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped of 1:250,000 in the continental U.S., Hawaii, Puerto Rico, and the Virgin Islands and 1:1,000,000 in Alaska. The level of mapping is designed for broad planning and management uses covering state, regional, and multi-state areas. The U.S. General Soil Map is comprised of general soil association units and is maintained and distributed as a spatial and tabular dataset.The U.S. General Soil Map was developed by the National Cooperative Soil Survey and supersedes the State Soil Geographic (STATSGO) dataset. The dataset was created by generalizing more detailed soil survey maps. Where more detailed soil survey maps were not available, data on geology, topography, vegetation, and climate were assembled and related to Land Remote Sensing Satellite (LANDSAT) images. Soils of similar areas were studied, and the probable classification and extent of the soils were determined.Map unit composition was determined by transecting or sampling areas on the more detailed maps and then statistically expanding the data to characterize the whole map unit.The dataset consists of georeferenced, vector and tabular data. The map data were collected in 1- by 2-degree topographic quadrangle units and merged into a seamless national dataset. The dataset is distributed in state, territorial, and national extents. The spatial units are linked to attributes in the tabular data, which give the proportionate extent of the component soils and their properties.The tabular data contains estimates of physical and chemical soil properties, soil interpretations, and static and dynamic metadata. Most of the tabular data exists in the database as a range of values for soil properties. The values depict the range for the geographic extent of the map unit. For most properties, the data include high, low, and representative values.Spatial data are available in ESRI® shapefile format. Spatial reference is decimal degrees, World Geodetic System 1984 (WGS84). Tabular data are available as ASCII text files (.txt). Fields are pipe delimited, and text is double-quote delimited. A Microsoft® Access® template database is available for use with the tabular data.https://www.nrcs.usda.gov/resources/data-and-reports/description-of-statsgo2-databaseCitation: Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. Available online at. http://websoilsurvey.nrcs.usda.gov/DSL SWI 土壤数据集是俄勒冈州美国农业部自然资源保护局（United States Department of Agriculture Natural Resources Conservation Service, USDA NRCS）栅格化国家土壤调查地理数据库（gridded National Soil Survey Geographic Database, gNATSGO）的两个精选子集。其中「SWI主要湿地土壤制图单元」图层代表由50%以上湿地土壤组分构成的土壤制图单元；「Agate-Winlo土壤制图单元」图层与杰克逊县的季节性池沼相关。这两个子集可用于规划、项目踏勘以及与DSL协调工作时，标识可能存在未填绘湿地的区域。 栅格化国家土壤调查地理数据库（gridded National Soil Survey Geographic Database, gNATSGO）是USDA-NRCS-SPSD的复合数据库，可为美国本土及海外领地所有区域提供最优可用的土壤信息。该数据库通过整合土壤调查地理数据库（Soil Survey Geographic Database, SSURGO）、州级土壤地理数据库（State Soil Geographic Database, STATSGO2）与栅格土壤调查数据库（Raster Soil Survey Databases, RSS）的数据，构建为单一无缝的ESRI文件地理数据库。 如需获取更多信息，请访问gNATSGO主页：https://www.nrcs.usda.gov/resources/data-and-reports/gridded-national-soil-survey-geographic-database-gnatsgo 与网络土壤调查平台：http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm。 ### NRCS对SSURGO数据库的说明 SSURGO数据库包含全国合作土壤调查项目历经一个世纪收集的土壤相关信息。此类信息可通过表格或地图形式展示，覆盖美国本土及USDA-NRCS服务的领地、自治邦和岛屿国家的绝大多数区域。信息采集方式包括实地踏勘观测土壤，并在实验室分析大量土壤样本。 地图以制图单元为单位勾勒区域，制图单元用于描述具备独特属性、解读方式与生产力的土壤及其他组分。信息采集比例尺范围为1:12000至1:63360，1:12000比例尺下采集的信息细节远丰富于1:63360比例尺。该制图成果服务于土地所有者、镇区与县级单位的自然资源规划与管理，使用者需具备一定土壤数据与地图比例尺相关知识，以避免误解。 数据库中的地图与各制图单元的组分土壤及其属性信息相关联。每个制图单元可包含1至3个主要组分及若干次要组分，制图单元通常以其主要组分命名。该数据库可提供的信息包括：有效持水量、土壤反应、电导率、洪水发生频率；农田、林地、牧场与草地的产量；以及影响休闲开发、建筑场地开发及其他工程用途的限制因素。 SSURGO数据集包含地图数据、表格数据以及地图与表格的制作相关信息。SSURGO数据集的范围为一个土壤调查区域，可涵盖单个县、多个县或多个县的部分区域。SSURGO地图数据可通过网络土壤调查平台查看，或下载为ESRI® Shapefile格式，坐标系为地理坐标系。属性数据可下载为文本格式，可导入Microsoft® Access®数据库。相关资源链接：https://www.nrcs.usda.gov/resources/data-and-reports/soil-survey-geographic-database-ssurgo ### NRCS对STATSGO2数据库的说明 美国数字通用土壤图（Digital General Soil Map of the United States）即STATSGO2，是对景观中以重复模式出现的土壤与非土壤区域的广谱清查，可在美国本土、夏威夷、波多黎各和维尔京群岛以1:250000比例尺制图表达，在阿拉斯加以1:1000000比例尺制图表达。该制图层级的设计目标是服务于州级、区域级及多州范围的广谱规划与管理需求。美国通用土壤图由通用土壤关联单元构成，作为空间与表格数据集进行维护与分发。 美国通用土壤图由全国合作土壤调查项目开发，替代了原州级土壤地理（State Soil Geographic, STATSGO）数据集。该数据集通过概化更详细的土壤调查地图制作而成；在无更详细土壤调查地图的区域，则整合地质、地形、植被与气候数据，并与陆地遥感卫星（Land Remote Sensing Satellite, LANDSAT）影像关联。研究人员通过研究相似区域的土壤，确定其可能的分类与分布范围。 制图单元的组分通过在更详细的地图上进行样线抽样或采样，再通过统计扩展数据以表征整个制图单元来确定。该数据集包含地理参考的矢量与表格数据。地图数据以1°×2°的地形四边形为单位采集，后合并为无缝的全国数据集。数据集按州、领地和全国范围进行分发。空间单元与表格数据中的属性相关联，这些属性给出了组分土壤的比例范围及其属性。 表格数据包含土壤物理和化学性质估算值、土壤解读信息以及静态与动态元数据。大部分表格数据以土壤性质的取值范围形式存在于数据库中，这些数值表征了制图单元地理范围内的取值区间。对于多数属性，数据包含最大值、最小值与代表值。 空间数据可获取为ESRI® Shapefile格式，空间参考为十进制度、世界大地测量系统1984（World Geodetic System 1984, WGS84）。表格数据可获取为ASCII文本文件（.txt），字段以竖线分隔，文本内容以双引号分隔。官方提供了适用于表格数据的Microsoft® Access®模板数据库。相关资源链接：https://www.nrcs.usda.gov/resources/data-and-reports/description-of-statsgo2-database ### 引用 美国农业部自然资源保护局土壤调查团队。网络土壤调查。可在线获取：http://websoilsurvey.nrcs.usda.gov/