Soil Survey Geographic (SSURGO) database for Rockingham County, Virginia

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

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

Publication_Date: 20090121

Title:

Soil Survey Geographic (SSURGO) database for Rockingham County, Virginia

Publication_Information:

Publication_Place: Fort Worth, Texas

Publisher:

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

Other_Citation_Details: va165

Online_Linkage: URL:<http://www.ftw.nrcs.usda.gov/ssur_data.html>

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 7.5 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: 19980210

Ending_Date: 20090121

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -79.250

East_Bounding_Coordinate: -78.375

North_Bounding_Coordinate: 38.875

South_Bounding_Coordinate: 38.125

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: Virginia

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: Rockingham County

Place:

Place_Keyword_Thesaurus: USGS Topographic Map Names Data Base

Place_Keyword: Bergton Quadrangle (s3807809)

Place_Keyword: Brandywine Quadrangle (s3807931)

Place_Keyword: Bridgewater Quadrangle (s3807833)

Place_Keyword: Briery Branch Quadrangle (s3807940)

Place_Keyword: Broadway Quadrangle (s3807826)

Place_Keyword: Browns Cove Quadrangle (s3807851)

Place_Keyword: Cow Knob Quadrangle (s3807924)

Place_Keyword: Crimora Quadrangle (s3807850)

Place_Keyword: Elkton East Quadrangle (s3807836)

Place_Keyword: Elkton West Quadrangle (s3807835)

Place_Keyword: Fletcher Quadrangle (s3807837)

Place_Keyword: Fort Seybert Quadrangle (s3807923)

Place_Keyword: Fulks Run Quadrangle (s3807817)

Place_Keyword: Grottoes Quadrangle (s3807842)

Place_Keyword: Harrisonburg Quadrangle (s3807834)

Place_Keyword: McGaheysville Quadrangle (s3807843)

Place_Keyword: Milam Quadrangle (s3807916)

Place_Keyword: Mount Sidney Quadrangle (s3807841)

Place_Keyword: New Market Quadrangle (s3807819)

Place_Keyword: Orkney Springs Quadrangle (s3807810)

Place_Keyword: Parnassus Quadrangle (s3807948)

Place_Keyword: Rawley Springs Quadrangle (s3807932)

Place_Keyword: Reddish Knob Quadrangle (s3807939)

Place_Keyword: Singers Glen Quadrangle (s3807825)

Place_Keyword: Swift Run Gap Quadrangle (s3807844)

Place_Keyword: Tenth Legion Quadrangle (s3807827)

Place_Keyword: Timberville Quadrangle (s3807818)

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: 1606 Santa Rosa Road

Address: Suite 209

City: Richmond

State_or_Province: VA

Postal_Code: 23229

Contact_Voice_Telephone: 804-287-1646

Contact_TDD/TTY_Telephone: 800-877-8339

Contact_Facsimile_Telephone: 804-287-1736

Contact_Electronic_Mail_Address: david.kriz@va.usda.gov

Cross_Reference:

Citation_Information:

Originator:

U.S. Department of Agriculture, Soil Conservation Service

Publication_Date: 1982

Title: Soil Survey of Rockingham County, Virginia

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. Quadrangles in this soil survey are not edge matched to those in the Albemarle County, Vriginia, Augusta County, Virginia, Page County, Virginia, Grant and Hardy Counties, West Virginia, and Pendleton County, West Virginia, soil surveys.

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 6 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: 1982

Title: Soil Survey of Rockingham County, Virginia

Geospatial_Data_Presentation_Form: atlas

Publication_Information:

Publication_Place: Washington, D.C.

Publisher: U.S. Government Printing Office

Source_Scale_Denominator: 20000

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: SCS1

Source_Contribution:

information for soil mapunit delineations, soil symbols and special soil features

Source_Information:

Source_Citation:

Citation_Information:

Originator:

U.S. Department of Agriculture, Soil Conservation Service

Publication_Date: unpublished material

Title: publication annotation overlay

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 20000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1991

Source_Currentness_Reference: 1991

Source_Citation_Abbreviation: SCS2

Source_Contribution:

final publication negatives used to develop ratioed film postives

Source_Information:

Source_Citation:

Citation_Information:

Originator:

U.S. Department of Agriculture, Soil Conservation Service

Publication_Date: unpublished material

Title:

ratioed film positives of publication annotation overlays

Geospatial_Data_Presentation_Form: remote sensing image

Source_Scale_Denominator: 24000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1991

Source_Currentness_Reference: 1991

Source_Citation_Abbreviation: SCS3

Source_Contribution:

source material for compiling to compilation base

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1965-1987

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: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1991

Ending_Date: 1991

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: USGS1

Source_Contribution: compilation base

Source_Information:

Source_Citation:

Citation_Information:

Originator:

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

Publication_Date: unpublished material

Title: annotated overlays

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 24000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1991

Ending_Date: 1997

Source_Currentness_Reference: 1997

Source_Citation_Abbreviation: NRCS1

Source_Contribution: digitizing source

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Commonwealth of Virginia, Department of Conservation and Recreation

Publication_Date: unpublished material

Title: statewide jurisdictional boundary layer

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 24000

Type_of_Source_Media: cartridge tape

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1997

Source_Currentness_Reference: 1997

Source_Citation_Abbreviation: DCR1

Source_Contribution: soil survey boundary source

Source_Information:

Source_Citation:

Citation_Information:

Originator:

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

Publication_Date: 1998

Title:

Soil Survey Geographic (SSURGO) database for Rockingham County, Virginia

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Fort Worth, Texas

Publisher:

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

Source_Scale_Denominator: 24000

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2002

Source_Currentness_Reference: 2002

Source_Citation_Abbreviation: NRCS2

Source_Contribution: SSURGO data for revision of attribute data

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: tabular digital data

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:

Rockingham County had a previously published soil survey, 1982, at 1:20,000 scale. An evaluation was made of the survey in 1991. It was determined that the soil map unit delineations and map unit components were adequate.

Source_Used_Citation_Abbreviation: SCS1

Process_Date: 1991

Process_Step:

Process_Description:

Ratioed film positives, at 1:24,000 scale were made from the final publication negatives. Soil map unit delineations and special features were manually compiled to an overlay registered to USGS 7.5 minute topographic quadrangle film positives. Special soil features were manually digitized at a resolution of 0.01 inch in GRASS Version 4.13. The soil map unit delineation overlays were raster scanned at a resolution of 200 DPI. The processing, raster editing, map neatline development, labeling, edge matching and vector conversion and editing were done in LTPlus Version 2.361A. The data were exported from LTPlus and imported into GRASS Version 4.13 for further editing. The data were created and maintained in North American Datum of 1927. The data were written to Digital Line Graph Optional format with the v.out.dlg command. The data were imported for verification in ARC/INFO 7.0.4. The digitized soil survey boundary was replaced with the jurisdictional boundary layer from the Virginia Department of Conservation and Recreation using arctools. Pseudo nodes were removed from all quads. New DLGs reflecting these changes were written with ARC/INFO 7.0.4. Compilation, digitizing and quality control were done by Natural Resources Conservation Service staff in Virginia.

Source_Used_Citation_Abbreviation: SCS2, SCS3, NRCS1, USGS1, DCR1

Process_Date: 1997

Process_Step:

Process_Description:

The Map Unit Interpretations Record database was developed by Natural Resources Conservation Service soil scientists according to national standards.

Source_Used_Citation_Abbreviation: SCS1

Process_Date: 1997

Process_Step:

Process_Description:

The National Soil Information System data base was developed by Natural Resources Conservation Service soil scientists according to national standards.

Source_Used_Citation_Abbreviation: SCS1

Process_Date: 2002

Process_Step:

Process_Description:

The online SSURGO data were imported to ARC/INFO 7.2.1 at the Natural Resources Conservation Service, Virginia Digitizing Unit. The SSURGO data were processed through revised AMLs dated October 1998. Minor codes were replaced to link spatial data map unit labels to the National Soil Information System data base. New DLG-3s were written. The data were forwarded to the National Cartography and Geospatial Center in Ft. Worth, Texas for archiving and distribution.

Source_Used_Citation_Abbreviation: NRCS2

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: 20041005

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: 20041005

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: 20060304

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: 20060304

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: 20060711

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: 20060711

Process_Step:

Process_Description:

The Natural Resources Conservation Service State Soil Scientist or delegate, generated new rating values for selected interpretations using current interpretation rules from the NASIS database.

Source_Used_Citation_Abbreviation: NASIS

Process_Date: 20061204

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: 20071218

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: 20071218

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: 20090121

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: 20090121

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0000001

Longitude_Resolution: 0.0000001

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

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 Rockingham County, Virginia

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: Rockingham County, Virginia 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: ARC/INFO coverage

Format_Information_Content: spatial

Transfer_Size: 31.5

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660 Level 1

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE

Format_Information_Content: spatial

Transfer_Size: 71.9

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660 Level 1

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcView shapefile

Format_Information_Content: spatial

Transfer_Size: 29.3

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660 Level 1

Digital_Form:

Digital_Transfer_Information:

Format_Name: DLG

Format_Version_Date: 19920508

Format_Specification: Optional

Format_Information_Content: spatial and keys

Transfer_Size: 19.7

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660 Level 1

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII

Format_Information_Content: keys and attributes

Transfer_Size: 12.0

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660 Level 1

Fees:

The charge is $50 for a CD-ROM that contains one or more data sets. A data set is one soil survey area in full quadrangle format and includes both spatial and attribute data.

Ordering_Instructions:

Call or write to organizations listed under Distributor. Spatial line data and locations of special feature symbols are in DLG-3 optional format, ARC/INFO coverage and export formats, and ArcView shapefile format. Digital line graph files contain major and minor code pairs in area and line records. A conversion legend is provided for each digital line graph file. Soil map symbols and special feature labels are available in a companion ASCII attribute file. The National Soil Information System attribute soil data are available in variable length, pipe delimited, ASCII file format.

Turnaround: 10 working days

Metadata_Reference_Information:

Metadata_Date: 20090121

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: 1606 Santa Rosa Road

Address: Suite 209

City: Richmond

State_or_Province: VA

Postal_Code: 23229

Contact_Voice_Telephone: 804-287-1646

Contact_Facsimile_Telephone: 804-287-1736

Contact_Electronic_Mail_Address: david.kriz@va.usda.gov

Contact_TDD/TTY_Telephone: 800-877-8339

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998