Services Directory - Soil___Hydrological

Soil___Hydrological_Group (Map Service)

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Current Version: 10.81

Service Description:

From gridded National Soil Survey Geographic Database (gNATSGO).

Used Soil Data Development Toolbox > gSSURGO Mapping Toolset > Create Soil Map Tool,

Exported Data Layer to TIFF, and Used Spatial Analyst > Reclass > Lookup Tool to create this data layer and display the HYDROLGRP_.

Follow instructions in "How to Create an On-Demand Soil Property or Interpretation Grid from gNATSGO". Shows sSSURGO data for California.

A - sand, loamy sand, sandy loam

B - loam, silt, loam or silt

C - sandy clay loam

D - clay loam, silty clay loam, sandy clay, silty clay, or clay

The gridded National Soil Survey Geographic Database (gNATSGO) is a USDA-NRCS Soil & Plant Science Division (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.

The state-wide gNATSGO databases contain a 10-meter raster of the soil map units and 70 related tables of soil properties and interpretations. It is designed to work with the SPSD gSSURGO ArcTools. Users can create full coverage thematic maps and grids of soil properties and interpretations for large geographic areas, such as the extent of a State or the conterminous United States. Please note that for the CONUS database, only a 30 meter raster is included.

SSURGO is the SPSD flagship soils database that has over 100 years of field-validated detailed soil mapping data. SSURGO contains soils information for more than 90 percent of the United States and island territories, but unmapped land remains. Click here for the current completion status of SSURGO mapping. STATSGO2 is a general soil map that has soils data for all of the United States and island territories, but the data is not as detailed as the SSURGO data. The Raster Soil Surveys (RSSs) are the next generation soil survey databases developed using advanced digital soil mapping methods.

https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/geo/?cid=nrcseprd1464625)

Use the Create A Soil Map ArcTool from the gSSURGO Mapping Toolset in the Soil Data Development Toolbox to make a TIFF data layer (Instructions: https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/geo/?cid=nrcseprd1464625#grid). Make a Hydrological Soils Group Map, and display it using the Hydrolgrp_ attribute.

Notes

The SPSD refreshes all published soil databases annually. gNATSGO will be included in the refresh cycle, which will provide a new up-to-date version of the database each year.
gNATSGO is an ESRI file geodatabase.
The soil map units are delivered only as a 10-meter raster version and are uniquely identified by the mukey, which is included in the attribute table. No vectorized version of the soil map units is included in gNATSGO.
The database has 70 tables that contain soil attributes, and relationship classes are built into the database to define relationships among tables.
The raster can be joined to the Mapunit and Muaggatt tables in the MUKEY field.
The database contains a feature class called SAPOLYGON. The “source” field in this feature class indicates whether the data was derived from SSURGO, STATSGO2, or an RSS.
A gNATSGO database was created for the conterminous United States and for each state or island territory that does not have complete coverage in SSURGO or has a published RSS.
If you encounter an ArcMap error when working with a gNATSGO dataset that reads “The number of unique values exceeds the limit” try increasing the maximum number of unique values to render in your Raster ArcMap Options. Specific instructions can be obtained here: https://support.esri.com/en/technical-article/000010117

Map Name: Layers

Legend

All Layers and Tables

Layers:

Soil (Hydrological Group Based on Dominant Condition Raster - 10m)(0)

Description:

From gridded National Soil Survey Geographic Database (gNATSGO).

Used Soil Data Development Toolbox > gSSURGO Mapping Toolset > Create Soil Map Tool,

Exported Data Layer to TIFF, and Used Spatial Analyst > Reclass > Lookup Tool to create this data layer and display the HYDROLGRP_.

Follow instructions in "How to Create an On-Demand Soil Property or Interpretation Grid from gNATSGO". Shows sSSURGO data for California.

A - sand, loamy sand, sandy loam

B - loam, silt, loam or silt

C - sandy clay loam

D - clay loam, silty clay loam, sandy clay, silty clay, or clay

https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/geo/?cid=nrcseprd1464625)

Notes

The SPSD refreshes all published soil databases annually. gNATSGO will be included in the refresh cycle, which will provide a new up-to-date version of the database each year.
gNATSGO is an ESRI file geodatabase.
The soil map units are delivered only as a 10-meter raster version and are uniquely identified by the mukey, which is included in the attribute table. No vectorized version of the soil map units is included in gNATSGO.
The database has 70 tables that contain soil attributes, and relationship classes are built into the database to define relationships among tables.
The raster can be joined to the Mapunit and Muaggatt tables in the MUKEY field.
The database contains a feature class called SAPOLYGON. The “source” field in this feature class indicates whether the data was derived from SSURGO, STATSGO2, or an RSS.
A gNATSGO database was created for the conterminous United States and for each state or island territory that does not have complete coverage in SSURGO or has a published RSS.
If you encounter an ArcMap error when working with a gNATSGO dataset that reads “The number of unique values exceeds the limit” try increasing the maximum number of unique values to render in your Raster ArcMap Options. Specific instructions can be obtained here: https://support.esri.com/en/technical-article/000010117

Copyright Text: Soil Survey Staff. Soil Survey Geographic Database (SSURGO). The Gridded National Soil Survey Geographic (gNATSGO) Database for Texas. United States Department of Agriculture, Natural Resources Conservation Service. Available online at https://nrcs.app.box.com/v/soils.

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Document Info:

Title: Soil - Hydrological Group
Author: kirstin.rochel_lasan
Comments:
Subject: Soil (Hydrological Group Based on Dominant Condition Raster - 10m)
Category:
Keywords: LASAN, Sanitation, Hydological Group, Los Angeles County, Soil, Nature, Nature Planning, Ecology