{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["000:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Soils Hotline", "hasEmail": "mailto:soilshotline@usda.gov"}, "dataQuality": true, "description": "Soil Landscapes of the United States, or SOLUS, is a national map product developed by the National Cooperative Soil Survey that is focused on providing a consistent set of spatially continuous soil property maps to support large scope soil investigations and land use decisions. SOLUS maps use a digital soil mapping framework that combines multiple sources of soil survey data with environmental covariate data and machine learning. Digital soil mapping is the production of georeferenced soil databases based on the quantitative relationships between soil measurements made in the field or laboratory and environmental data. Numerical models use the quantitative relationships to predict the spatial distribution of either discrete soil classes, such as map units, or continuous soil properties, such as clay content. \r\n\r\nSOLUS maps use continuous property mapping, which predicts soil physical or chemical properties in horizontal and vertical dimensions. The soil properties are represented across a continuous range of values. Raster datasets of select soil properties can be predicted at specified depths or depth intervals. Continuous soil property maps such as SOLUS provide critical natural resource information to support environmental researchers and modelers, conservationists, and others making land management decisions. SOLUS will be updated annually with improved data and methodology. \r\n\r\nThe SOLUS dataset includes 20 different soil properties (listed below) with most properties predicted for seven standard depths (0, 5, 15, 30, 60, 100, and 150 cm).\r\n\r\nProperties included in SOLUS100:\r\n\r\nBulk density (oven dry)\r\nCalcium carbonate\r\nCation Exchange Capacity (pH 7)\r\nClay\r\nCoarse sand\r\nElectrical Conductivity (sat. paste)\r\nEffective cation exchange capacity\r\nFine sand\r\nGypsum (in <20 mm fraction)\r\nMedium sand\r\npH (1:1 method)\r\nRock content\r\nSand\r\nSodium adsorption ratio\r\nSilt\r\nSoil organic carbon\r\nVery coarse sand\r\nVery fine sand\r\nDepth to bedrock\r\nDepth to restriction", "distribution": [{"@type": "dcat:Distribution", "conformsTo": "https://standards.iso.org/iso/19115/-3/cat/1.0/", "downloadURL": "https://inventory.data.gov/dataset/b3f01095-f929-485d-9a9e-5b627c7b4379/resource/0dfa9ae9-65aa-4c23-95d6-f186adadda84/download/solus100-metadata-v9b.xml", "mediaType": "application/xml", "title": "SOLUS100-metadata-v9b.xml"}], "identifier": "430-18-1", "issued": "2024-02-01", "keyword": ["Soil Properties", "Soil Survey", "Soils Theme", "USDA", "USDA-NRCS", "ncss", "nrcs", "soil-map"], "landingPage": "https://www.nrcs.usda.gov/resources/data-and-reports/soil-landscapes-of-the-united-states-solus", "language": ["en-US"], "license": "https://www.usa.gov/publicdomain/label/1.0/", "modified": "2026-03-03", "programCode": ["000:000"], "publisher": {"@type": "org:Organization", "name": "Natural Resources Conservation Service", "subOrganizationOf": {"@type": "org:Organization", "name": "Natural Resources Conservation Service"}}, "rights": "true", "spatial": "United States", "theme": ["geospatial"], "title": "Soil Landscapes of the United States 100-meter (SOLUS100) soil property maps"}