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IL037 - DeKalb County, Illinois

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Soil Survey Geographic (SSURGO) database for De Kalb County, Illinois

Metadata also available as

Identification_Information:

Citation:

Citation_Information:

Originator:

U.S. Department of Agriculture, Natural Resources Conservation Service

Publication_Date: 20061226

Title:

Soil Survey Geographic (SSURGO) database for De Kalb County, Illinois

Publication_Information:

Publication_Place: Fort Worth, Texas
Publisher:: U.S. Department of Agriculture, Natural Resources Conservation Service

Other_Citation_Details: il037

Online_Linkage: URL:<http://SoilDataMart.nrcs.usda.gov/>

Description:

Abstract:: This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information.
This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a 3.75 minute quadrangle format and include a detailed, field verified inventory of soils and nonsoil areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
Purpose:: SSURGO depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.
Supplemental_Information:: Digital versions of hydrography, cultural features, and other associated layers that are not part of the SSURGO data set may be available from the primary organization listed in the Point of Contact.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020409
Ending_Date: 20061226

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -89.0000
East_Bounding_Coordinate: -88.5625
North_Bounding_Coordinate: 42.1875
South_Bounding_Coordinate: 41.6250

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: soil survey
Theme_Keyword: soils
Theme_Keyword: Soil Survey Geographic
Theme_Keyword: SSURGO

Place:

Place_Keyword_Thesaurus:: Counties and County Equivalents of the States of the United States and the District of Columbia (FIPS Pub 6-3)
Place_Keyword: Illinois

Place:

Place_Keyword_Thesaurus:: Counties and County Equivalents of the States of the United States and the District of Columbia (FIPS Pub 6-3)
Place_Keyword: De Kalb County

Place:

Place_Keyword_Thesaurus: USGS Topographic Map Names Data Base
Place_Keyword: Cherry Valley SW Quadrangle (s4208849)
Place_Keyword: Cherry Valley SE Quadrangle (s4208849)
Place_Keyword: Belvidere South SW Quadrangle (s4208850)
Place_Keyword: Belvidere South SE Quadrangle (s4208850)
Place_Keyword: Riley SW Quadrangle (s4208851)
Place_Keyword: Riley SE Quadrangle (s4208851)
Place_Keyword: Marengo South SW Quadrangle (s4208852)
Place_Keyword: Fairdale NW Quadrangle (s4208857)
Place_Keyword: Fairdale NE Quadrangle (s4208857)
Place_Keyword: Kirkland NW Quadrangle (s4208858)
Place_Keyword: Kirkland NE Quadrangle (s4208858)
Place_Keyword: Genoa NW Quadrangle (s4208859)
Place_Keyword: Genoa NE Quadrangle (s4208859)
Place_Keyword: Hampshire NW Quadrangle (s4208860)
Place_Keyword: Fairdale SW Quadrangle (s4208857)
Place_Keyword: Fairdale SE Quadrangle (s4208857)
Place_Keyword: Kirkland SW Quadrangle (s4208858)
Place_Keyword: Kirkland SE Quadrangle (s4208858)
Place_Keyword: Genoa SW Quadrangle (s4208859)
Place_Keyword: Genoa SE Quadrangle (s4208859)
Place_Keyword: Hampshire SW Quadrangle (s4208860)
Place_Keyword: Creston NW Quadrangle (s4108801)
Place_Keyword: Creston NE Quadrangle (s4108801)
Place_Keyword: De Kalb NW Quadrangle (s4108802)
Place_Keyword: De Kalb NE Quadrangle (s4108802)
Place_Keyword: Sycamore NW Quadrangle (s4108803)
Place_Keyword: Sycamore NE Quadrangle (s4108803)
Place_Keyword: Maple Park NW Quadrangle (s4108804)
Place_Keyword: Creston SW Quadrangle (s4108801)
Place_Keyword: Creston SE Quadrangle (s4108801)
Place_Keyword: De Kalb SW Quadrangle (s4108802)
Place_Keyword: De Kalb SE Quadrangle (s4108802)
Place_Keyword: Sycamore SW Quadrangle (s4108803)
Place_Keyword: Sycamore SE Quadrangle (s4108803)
Place_Keyword: Maple Park SW Quadrangle (s4108804)
Place_Keyword: Lee NW Quadrangle (s4108809)
Place_Keyword: Lee NE Quadrangle (s4108809)
Place_Keyword: Waterman NW Quadrangle (s4108810)
Place_Keyword: Waterman NE Quadrangle (s4108810)
Place_Keyword: Hinckley NW Quadrangle (s4108811)
Place_Keyword: Hinckley NE Quadrangle (s4108811)
Place_Keyword: Big Rock NW Quadrangle (s4108812)
Place_Keyword: Lee SW Quadrangle (s4108809)
Place_Keyword: Lee SE Quadrangle (s4108809)
Place_Keyword: Waterman SW Quadrangle (s4108810)
Place_Keyword: Waterman SE Quadrangle (s4108810)
Place_Keyword: Hinckley SW Quadrangle (s4108811)
Place_Keyword: Hinckley SE Quadrangle (s4108811)
Place_Keyword: Big Rock SW Quadrangle (s4108812)
Place_Keyword: Paw Paw NW Quadrangle (s4108817)
Place_Keyword: Paw Paw NE Quadrangle (s4108817)
Place_Keyword: Shabbona Grove NW Quadrangle (s4108818)
Place_Keyword: Shabbona Grove NE Quadrangle (s4108818)
Place_Keyword: Somonauk NW Quadrangle (s4108819)
Place_Keyword: Somonauk NE Quadrangle (s4108819)
Place_Keyword: Plano NW Quadrangle (s4108820)
Place_Keyword: Paw Paw SW Quadrangle (s4108817)
Place_Keyword: Paw Paw SE Quadrangle (s4108817)
Place_Keyword: Shabbona Grove SW Quadrangle (s4108818)
Place_Keyword: Shabbona Grove SE Quadrangle (s4108818)
Place_Keyword: Somonauk SW Quadrangle (s4108819)
Place_Keyword: Somonauk SE Quadrangle (s4108819)
Place_Keyword: Plano SW Quadrangle (s4108820)

Access_Constraints: None

Use_Constraints:

The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data.

This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions that they make. The Natural Resources Conservation Service will not perform any evaluations of these maps for purposes related solely to State or local regulatory programs.

Photographic or digital enlargement of these maps to scales greater than at which they were originally mapped can cause misinterpretation of the data. If enlarged, maps do not show the small areas of contrasting soils that could have been shown at a larger scale. The depicted soil boundaries, interpretations, and analysis derived from them do not eliminate the need for onsite sampling, testing, and detailed study of specific sites for intensive uses. Thus, these data and their interpretations are intended for planning purposes only. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: U.S. Department of Agriculture, Natural Resources Conservation Service

Contact_Position: State Soil Scientist

Contact_Address:

Address_Type: mailing address
Address: USDA - Natural Resources Conservation Service
Address: Illinois State Office
Address: 2118 West Park Court
City: Champaign
State_or_Province: IL
Postal_Code: 61821

Contact_Voice_Telephone: 217-353-6643

Contact_TDD/TTY_Telephone: 800-877-8339

Contact_Electronic_Mail_Address: bob.mcleese@il.usda.gov

Cross_Reference:

Citation_Information:

Originator: U.S. Department of Agriculture, Soil Conservation Service
Publication_Date: 1978
Title: Soil Survey of De Kalb County, Illinois
Geospatial_Data_Presentation_Form: text, table, map
Other_Citation_Details:: This soil survey contains information that can be applied in managing farms and wetlands; in selecting sites for roads, ponds, buildings, and other structures; and in judging the suitability of tracts of land for farming, industry, and recreation.
This soil survey depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Attribute accuracy is tested by manual comparison of the source with hard copy plots and/or symbolized display of the map data on an interactive computer graphic system. Selected attributes that cannot be visually verified on plots or on screen are interactively queried and verified on screen. In addition, the attributes are tested against a master set of valid attributes. All attribute data conform to the attribute codes in the signed classification and correlation document and amendment(s).

Logical_Consistency_Report:

Certain node/geometry and topology GT- polygon/chain relationships are collected or generated to satisfy topological requirements (the GT-polygon corresponds to the soil delineation). Some of these requirements include: chains must begin and end at nodes, chains must connect to each other at nodes, chains do not extend through nodes, left and right GT-polygons are defined for each chain element and are consistent throughout, and the chains representing the limits of the file (neatline) are free of gaps. The tests of logical consistency are performed using vendor software. The neatline is generated by connecting the explicitly entered four corners of the digital file. All data outside the enclosed region are ignored and all data crossing these geographically straight lines are clipped at the neatline. Data within a specified tolerance of the neatline are snapped to the neatline. Neatline straightening aligns the digitized edges of the digital data with the generated neatline (i.e., with the longitude/latitude lines in geographic coordinates). All internal polygons are tested for closure with vendor software and are checked on hard copy plots. All data are checked for common soil lines (i.e., adjacent polygons with the same label). Quadrangles are edge matched within the soil survey area and edge locations generally do not deviate from centerline to centerline by more than 0.01 inch. The quadrangles in this soil survey are edge matched to quadrangles in McHenry, Kane, and Winnebago Counties, Illinois.

Completeness_Report:

A map unit is a collection of areas defined and named the same in terms of their soil and/or nonsoil areas. Each map unit differs in some respect from all others in a survey area and is uniquely identified. Each individual area is a delineation. Each map unit consists of one or more components.

Soil scientists identify small areas of soils or miscellaneous (nonsoil) areas that have properties and behavior significantly different than the named soils in the surrounding map unit. These minor components may be indicated as special features. If they have a minimal effect on use and management, or could not be precisely located, they may not be indicated on the map.

Specific National Cooperative Soil Survey standards and procedures were used in the classification of soils, design and name of map units, and location of special soil features. These standards are outlined in Agricultural Handbook 18, Soil Survey Manual, 1993, USDA, SCS; Agricultural Handbook 436, Soil Taxonomy, Soil Survey Staff, 1975, USDA, SCS; and all Amendments; Keys to Soil Taxonomy, Soil Survey Staff, (current issue); National Soil Survey Handbook, title 430-VI, (current issue).

The actual composition and interpretive purity of the map unit delineations were based on data collected by scientists during the course of preparing the soil maps. Adherence to National Cooperative Soil Survey standards and procedures is based on peer review, quality control, and quality assurance. Quality control is outlined in the memorandum of understanding for the soil survey area and in documents that reside with the Natural Resources Conservation Service state soil scientist. Four kinds of map units are used in soil surveys: consociations, complexes, associations, and undifferentiated groups.

Consociations - Consociations are named for the dominant soil. In a consociation, delineated areas are dominated by a single soil taxon and similar soils. At least one half of the pedons in each delineation are of the same soil component so similar to the named soil that major interpretations are not affected significantly. The total amount of dissimilar inclusions of other components in a map unit generally does not exceed about 15 percent if limiting and 25 percent if nonlimiting. A single component of a dissimilar limiting inclusion generally does not exceed 10 percent if very contrasting.

Complexes and associations - Complexes and associations are named for two or more dissimilar components with the dominant component listed first. They occur in a regularly repeating pattern. The major components of a complex cannot be mapped separately at a scale of about 1:24,000. The major components of an association can be separated at a scale of about 1:24,000. In each delineation of either a complex or an association, each major component is normally present, though their proportions may vary appreciably from one delineation to another. The total amount of inclusions in a map unit that are dissimilar to any of the major components does not exceed 15 percent if limiting and 25 percent if nonlimiting. A single kind of dissimilar limiting inclusion usually does not exceed 10 percent.

Undifferentiated groups - Undifferentiated groups consist of two or more components that do not always occur together in the same delineation, but are included in the same named map unit because use and management are the same or similar for common uses. Every delineation has at least one of the major components and some may have all of them. The same principles regarding proportion of inclusions apply to undifferentiated groups as to consociations.

Minimum documentation consists of three complete soil profile descriptions that are collected for each soil added to the legend, one additional per 3,000 acres mapped; three 10 observation transects for each map unit, one additional 10 point transect per 3,000 acres.

A defined standard or level of confidence in the interpretive purity of the map unit delineations is attained by adjusting the kind and intensity of field investigations. Field investigations and data collection are carried out in sufficient detail to name map units and to identify accurately and consistently areas of about 2 acres.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: The accuracy of these digital data is based upon their compilation to base maps that meet National Map Accuracy Standards. The difference in positional accuracy between the soil boundaries and special soil features locations in the field and their digitized map locations is unknown. The locational accuracy of soil delineations on the ground varies with the transition between map units.
For example, on long gently sloping landscapes the transition occurs gradually over many feet. Where landscapes change abruptly from steep to level, the transition will be very narrow. Soil delineation boundaries and special soil features generally were digitized within 0.01 inch of their locations on the digitizing source. The digital map elements are edge matched between data sets. The data along each quadrangle edge are matched against the data for the adjacent quadrangle. Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Department of Agriculture, Soil Conservation Service

Publication_Date: 1978

Title: Soil Survey of De Kalb County, Illinois

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Washington, D.C.
Publisher: U.S. Government Printing Office

Source_Scale_Denominator: 15840

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1978

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: SCS1

Source_Contribution:

source material for scanning soil area features and source and reference of soil map unit delineations, soil symbols, and special soil features

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Department of Agriculture, Soil Conservation Service
Publication_Date: 1978
Title: composite publication film positives
Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 15840

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1978

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: SCS2

Source_Contribution: source for ratioed film positives

Source_Information:

Source_Citation:

Citation_Information:

Originator:: U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: unpublished material
Title:: ratioed film positives of composite publication film positives
Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 12000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1999

Source_Currentness_Reference: 1999

Source_Citation_Abbreviation: NRCS1

Source_Contribution: source material for compiling to compilation base

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1974

Title: multiple photographs

Geospatial_Data_Presentation_Form: remote sensing image

Publication_Information:

Publication_Place: Salt Lake City, Utah
Publisher:: U.S. Department of Agriculture, Agricultural Stabilization and Conservation Service

Source_Scale_Denominator: 15840

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1997
Ending_Date: 2001

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: USGS1

Source_Contribution: base material for field mapping

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1961-1983

Title: multiple 7.5 minute topographic quadrangles

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Source_Scale_Denominator: 24000

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1999
Ending_Date: 2001

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: USGS2

Source_Contribution: basic reference about soils and landscapes

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1993-1998

Title: multiple 3.75 minute orthophoto quadrangles

Geospatial_Data_Presentation_Form: remote sensing image

Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Source_Scale_Denominator: 12000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1999
Ending_Date: 2001

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: USGS3

Source_Contribution: base material for map compilation

Source_Information:

Source_Citation:

Citation_Information:

Originator:: U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: unpublished material
Title: annotated stable-base overlays
Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 12000

Type_of_Source_Media: stable base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2000

Source_Currentness_Reference: 2000

Source_Citation_Abbreviation: NRCS2

Source_Contribution:

source material for scanning special soil features and some soil area features

Source_Information:

Source_Citation:

Citation_Information:

Originator:

U.S. Department of Agriculture, Natural Resources Conservation Service

Publication_Date: 2004

Title: National Soil Information System (NASIS) data base

Geospatial_Data_Presentation_Form: unknown

Publication_Information:

Publication_Place: Fort Collins, Colorado
Publisher:: U.S. Department of Agriculture, Natural Resources Conservation Service

Type_of_Source_Media: database

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2004
Ending_Date: 2004

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: NASIS

Source_Contribution: attribute (tabular) information

Process_Step:

Process_Description:: A detailed evaluation of the 1978 De Kalb County Soil Survey, at 1:15840 scale, found that significant changes in land use, soil classification, soil interpretations, and standards and procedures for making soil surveys made the previously published soil survey obsolete. A soil survey update for De Kalb County was initiated in 1997 and field investigations were completed in 1999, at 1:12000 scale. The classification and map unit names were finalized at the update final correlation in 1999. Field procedures for the second order soil survey included plotting of soil boundaries determined by field observations and interpretation of remotely sensed data.
Source_Used_Citation_Abbreviation: SCS1, USGS1
Process_Date: 1999

Process_Step:

Process_Description:: Field sheets from the 1978 published soil survey were scanned by a private vendor at a scale of 1:15840 and fit to the 3.75 minute orthophoto quadrangles using the affine transformation command in ARC/INFO 7.2.1. All spatial data was reviewed by the Aurora MLRA staff in Illinois. The review indicated the need to edit all 63 quarter quadrangles. The soil area features for 23 quarter quadrangles were updated and edited using GRASS 4.1 and then converted to coverages with ARC/INFO 7.2.1 by the Aurora MLRA staff. This process was then re-evaluated. Soil scientists in the Aurora MLRA Office used ratioed film positives developed from the composite publication film positives to manually recompile the balance of 40 quarter quadrangles to 3.75 minute orthophoto quadrangle base maps at 1:12000 scale. The soil delineations were penciled onto Hulen punch registered film (7 mil) overlays. Illinois soil scientists performed compilation and quality assurance. These remaining 40 annotated soil overlays were sent to the Michigan Soil Digitizing Unit in East Lansing, Michigan. The annotated soil overlays were raster scanned at Midwest Graphics Services in Kenosha, Wisconsin, using an Anatech Eagle 4050 scanner at 250 dpi. The soil line processing of raster editing, vector conversion, labeling, edgematching and error correction was done using LT4X version 4.11. The soil line data were then exported using the ssurgo_area export command. The DLGs for the soil area features were returned to the Aurora MLRA office in Illinois for further processing. The Aurora MLRA office imported the soil area DLGs into ARC/INFO 8.0.1. The coverage of De Kalb County was edited to better match the surrounding soil surveys. Soil scientists, GIS specialists and soil data quality specialists performed quality control. The special soil features that were present on the scanned field sheets were updated and edited using on-screen digitizing with GRASS 4.1 and then converted to coverages using ARC/INFO 7.2.1 by the Aurora MLRA Office staff. The soil area features and soil special features were then exported as Digital Line Graph Optional format files using the ARC/INFO 8.0.1 arcdlg command. The new DLGs were sent to the Michigan Soil Digitizing Unit for SSURGO evaluation and certification. The soil and special soil feature DLGs were imported for verification into ARC/INFO 7.2.1. The data were edited. New DLGs reflecting these changes were written with ARC/INFO 7.2.1 for adherence to SSURGO standards. The Michigan Soil Digitizing and Certification staff performed the SSURGO certification and quality assurance. The data were forwarded to the National Cartography and Geospatial Center in Fort Worth, Texas for archiving and distribution.
Source_Used_Citation_Abbreviation: SCS2, USGS1, USGS2, USGS3, NRCS1, NRCS2
Process_Date: 2002

Process_Step:

Process_Description:: The National Soil Information System database was developed by the Natural Resources Conservation Service soil scientists according to national standards.
Source_Used_Citation_Abbreviation: SCS1, NRCS1
Process_Date: 2002

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20040323

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20040323

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20041223

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20041223

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060316

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060316

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20061226

Process_Step:

Process_Description:: The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20061226

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Geographic_Coordinate_Units: Decimal degrees
Latitude_Resolution: 0.0000001
Longitude_Resolution: 0.0000001

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Special Soil Features
Entity_Type_Definition:: Special Soil Features represent soil, nonsoil, or landform features that are too small to be digitized as soil delineations (area features).
Entity_Type_Definition_Source:: U.S. Department of Agriculture. 1993. Soil Survey Manual. Soil Surv. Staff, U.S. Dep. Agric. Handb. 18.

Attribute:

Attribute_Label: Special Soil Features Codes

Attribute_Definition:

Special Soil Features Codes represent specific Special Soil Features. These features are identified with a major code, a minor code, and a descriptive label. The codes and label are assigned to the point or line assigned to represent the feature on published maps.

Attribute_Definition_Source:

U.S. Department of Agriculture. 1993. Soil Survey Manual. Soil Surv. Staff, U.S. Dep. Agric. Handb. 18; U.S. Department of Agriculture. (current issue). National Soil Survey Handbook, title 430-VI, part 647. Soil Conserv. Serv.

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name:: Classification and Correlation of the Soils of De Kalb County, Illinois
Codeset_Source:: U.S. Department of Agriculture, Natural Resources Conservation Service

Overview_Description:

Entity_and_Attribute_Overview:

Map Unit Delineations 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 is linked to a map unit name. The map unit symbol is also the key for linking information in the National Soil Information System tables. The map unit symbols are not carried within the modified Digital Line Graph file; however, they are made available in a companion attribute file. The attribute file links the minor codes in the Digital Line Graph files to the map unit symbols.

Map Unit Delineations are described by the National Soil Information System database. This attribute database gives the proportionate extent of the component soils and the properties for each soil. The database contains both estimated and measured data on the physical and chemical soil properties and soil interpretations for engineering, water management, recreation, agronomic, woodland, range, and wildlife uses of the soil.

The National Soil Information System database contains static metadata. It documents the data structure and includes such information as what tables, columns, indexes, and relationships are defined as well as a variety of attributes of each of these database objects. Attributes include table and column descriptions and detailed domain information.

The National Soil Information System database also contains a distribution metadata. It records the criteria used for selecting map units and components for inclusion in the set of distributed data.

Special features are described in the feature table. It includes a feature label, feature name, and feature description for each special and ad hoc feature in the survey area.

Entity_and_Attribute_Detail_Citation:

U.S. Department of Agriculture. 1999. Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys. Soil Conserv. Serv., U.S. Dep. Agric. Handb. 436.

U.S. Department of Agriculture. (current issue). Keys to Soil Taxonomy. Soil Surv. Staff, Soil Conserv. Serv.

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.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center

Contact_Address:

Address_Type: mailing address
Address: P.O. Box 6567
City: Fort Worth
State_or_Province: Texas
Postal_Code: 76115

Contact_Voice_Telephone: 800 672 5559

Contact_Facsimile_Telephone: 817 509 3469

Resource_Description: De Kalb County, Illinois SSURGO

Distribution_Liability:

Although these data have been processed successfully on a computer system at the U.S. Department of Agriculture, no warranty expressed or implied is made by the Agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Department of Agriculture will warrant the delivery of this product in computer readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Request for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site.

The U.S. Department of Agriculture, nor any of its agencies are liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.)

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcView shapefile
Format_Information_Content: spatial
File_Decompression_Technique: WinZip or equivalent
Transfer_Size: 64.3

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: URL:<http://SoilDataMart.nrcs.usda.gov/>

Access_Instructions:

Select desired survey area at above Internet Web site. An email address is required for receipt of instructions on retrieval via anonymous FTP. Anticipate a delay between submission of request at Web site and receipt of email message.

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARC/INFO coverage
Format_Information_Content: spatial
File_Decompression_Technique: WinZip or equivalent
Transfer_Size: 64.3

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: URL:<http://SoilDataMart.nrcs.usda.gov/>

Access_Instructions:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARC/INFO interchange file
Format_Information_Content: spatial
File_Decompression_Technique: WinZip or equivalent
Transfer_Size: 64.3

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: URL:<http://SoilDataMart.nrcs.usda.gov/>

Access_Instructions:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII
Format_Information_Content: keys and attributes
File_Decompression_Technique: WinZip or equivalent
Transfer_Size: 17.2

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: URL:<http://SoilDataMart.nrcs.usda.gov/>

Access_Instructions:

Fees:

There is currently no direct charge for requesting data or for retrieval via FTP.

Ordering_Instructions:

Visit the above mentioned Internet Web Site, select state or territory, then select individual soil survey area of interest. Spatial line data and locations of special feature symbols are in ESRI ArcGIS (ArcView,ArcInfo) shapefile, coverage and interchange (i.e., export) formats. The National Soil Information System attribute soil data are available in variable length, pipe delimited, ASCII file format.

Turnaround: Typically within four hours

Metadata_Reference_Information:

Metadata_Date: 20080820

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: U.S. Department of Agriculture, Natural Resources Conservation Service

Contact_Position: State Soil Scientist

Contact_Address:

Address_Type: mailing address
Address: USDA - Natural Resources Conservation Service
Address: Illinois State Office
Address: 2118 West Park Court
City: Champaign
State_or_Province: IL
Postal_Code: 61821

Contact_Voice_Telephone: 217-353-6643

Contact_TDD/TTY_Telephone: 800-877-8339

Contact_Electronic_Mail_Address: bob.mcleese@il.usda.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Generated by mp version 2.7.30 on Tue Feb 09 21:10:08 2010


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