Tags
gridded, SSURGO, Geospatial Data Gateway, soils, raster, GDG, Soil Survey, gSSURGO, Arkansas, United States of America, AR001, AR003, AR007, AR009, AR011, AR015, AR017, AR021, AR025, AR027, AR029, AR031, AR033, AR035, AR037, AR041, AR043, AR045, AR047, AR051, AR053, AR055, AR057, AR061, AR063, AR067, AR071, AR075, AR077, AR083, AR087, AR093, AR095, AR097, AR099, AR101, AR103, AR105, AR107, AR109, AR111, AR113, AR115, AR119, AR121, AR123, AR125, AR127, AR129, AR131, AR133, AR135, AR137, AR139, AR143, AR145, AR147, AR149, AR610, AR620, AR630, AR640, AR650, AR660, AR670, AR680, USA
The Gridded SSURGO dataset was created for use in national, regional, and state-wide resource planning and analysis of soils data. The raster map layer data can be readily combined with other national, regional, and local raster layers, e.g., National Land Cover Database (NLCD), the National Agricultural Statistics Service (NASS) Crop Data Layer, or the National Elevation Dataset(NED).
This dataset is called the Gridded SSURGO (gSSURGO) Database and is derived from the Soil Survey Geographic (SSURGO) Database. SSURGO is generally the most detailed level of soil geographic data developed by the National Cooperative Soil Survey (NCSS) in accordance with NCSS mapping standards. The tabular data represent the soil attributes, and are derived from properties and characteristics stored in the National Soil Information System (NASIS). The gSSURGO data were prepared by merging traditional SSURGO digital vector map and tabular data into State-wide extents, and adding a State-wide gridded map layer derived from the vector, plus a new value added look up (valu) table containing "ready to map" attributes. The gridded map layer is offered in an ArcGIS file geodatabase raster format. The raster and vector map data have a State-wide extent. The raster map data have a 10 meter cell size that approximates the vector polygons in an Albers Equal Area projection. Each cell (and polygon) is linked to a map unit identifier called the map unit key. A unique map unit key is used to link to raster cells and polygons to attribute tables, including the new value added look up (valu) table that contains additional derived data. The value added look up (valu) table contains attribute data summarized to the map unit level using best practice generalization methods intended to meet the needs of most users. The generalization methods include map unit component weighted averages and percent of the map unit meeting a given criteria.
There are no credits for this item.
There are no access and use limitations for this item.
Extent
| West | -94.618290 | East | -89.616749 |
| North | 36.531902 | South | 34.448880 |
See access and use constraints information.
Feature geometry.
ESRI
Coordinates defining the features.
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Raster cell locations are based on map unit delineations which are closed polygons that may be dominated by a single soil or nonsoil component plus allowable similar or dissimilar soils, or they can be geographic mixtures of groups of soils or soils and nonsoil areas. The map unit symbol uniquely identifies each closed delineation map unit. Each symbol corresponds to a map unit name. The map unit key is used to link to information in the National Soil Information System (NASIS) tables. A new table, 'Lookup_Mukey' was created and contains the mukey value for all soil surveys in the database. The mukey column and value was added to the raster attribute table to facilitate joins with the attribute data.
U.S. Department of Agriculture. 1999. Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys. Natural Resources Conservation Service, U.S. Dep. Agric. Handb. 436. U.S. Department of Agriculture. (current issue). Keys to Soil Taxonomy. Soil Surv. Staff, Natural Resources Conservation Service. U.S. Department of Agriculture. (current issue). National Soil Survey Handbook, title 430-VI. Soil Surv. Staff, Natural Resources Conservation Service. U.S. Department of Agriculture. 1993. Soil Survey Manual. Soil Surv. Staff, U.S. Dep. Agric. Handb. 18.
Raster cell locations are based on map unit delineations which are closed polygons that may be dominated by a single soil or nonsoil component plus allowable similar or dissimilar soils, or they can be geographic mixtures of groups of soils or soils and nonsoil areas. The map unit symbol uniquely identifies each closed delineation map unit. Each symbol corresponds to a map unit name. The map unit key is used to link to information in the National Soil Information System (NASIS) tables. A new table, 'Lookup_Mukey' was created and contains the mukey value for all soil surveys in the database. The mukey column and value was added to the raster attribute table to facilitate joins with the attribute data.
U.S. Department of Agriculture. 1999. Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys. Natural Resources Conservation Service, U.S. Dep. Agric. Handb. 436. U.S. Department of Agriculture. (current issue). Keys to Soil Taxonomy. Soil Surv. Staff, Natural Resources Conservation Service. U.S. Department of Agriculture. (current issue). National Soil Survey Handbook, title 430-VI. Soil Surv. Staff, Natural Resources Conservation Service. U.S. Department of Agriculture. 1993. Soil Survey Manual. Soil Surv. Staff, U.S. Dep. Agric. Handb. 18.