R-Factor for the Coterminous United States

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:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS),Office for Coastal Management (OCM)

Publication_Date: 20131226

Title: R-Factor for the Coterminous United States

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Charleston, SC

Publisher: NOAA's Ocean Service, Office for Coastal Management (OCM)

Other_Citation_Details:

Renard, K.G., Foster, C.R., Weesies, G.A., McCool, D.K., Yoder, D.C., (1997). Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE). US Department of Agriculture, Agriculture Handbook Number 703, Government Printing Office, Washington, DC, p.47-51.

Online_Linkage: http://coast.noaa.gov/digitalcoast/tools/opennspect

Description:

Abstract:

The rainfall-runoff erosivity factor (R-Factor) quantifies the effects of raindrop impacts and reflects the amount and rate of runoff associated with the rain. The R-factor is one of the parameters used by the Revised Unified Soil Loss Equation (RUSLE) to estimate annual rates of erosion. This product is a raster representation of R-Factor derived from isoerodent maps published in the Agriculture Handbook Number 703 (Renard et al.,1997). Lines connecting points of equal rainfall ersoivity are called isoerodents. The iserodents plotted on a map of the coterminous U.S. were digitized, then values between these lines were obtained by linear interpolation. The final R-Factor data are in raster GeoTiff format at 800 meter resolution in Albers Conic Equal Area, GRS80, NAD83.

Purpose:

These data are represented in raster format for use with the Open source Nonpoint Source Pollution and Erosion Comparison Tool (OpenNSPECT).

Supplemental_Information:

These data are derived from isoerodent maps published in the Agriculture Handbook number 703 (Renard et al., 1997). Renard, K.G., Foster, C.R., Weesies, G.A., McCool, D.K., Yoder, D.C., (1997). Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE). US Department of Agriculture, Agriculture Handbook Number 703, Government Printing Office, Washington, DC, p. 47-51.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1975

Beginning_Time: Unknown

Ending_Date: 1997

Ending_Time: Unknown

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -125.325871714

East_Bounding_Coordinate: -66.4104121711

North_Bounding_Coordinate: 48.4453282747

South_Bounding_Coordinate: 24.5562065906

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: climatologyMeteorologyAtmosphere

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Environmental Monitoring

Theme_Keyword: R-Factor

Theme_Keyword: Rainfall-Runoff Erosivity

Theme_Keyword: Revised Universal Soil Loss Equation

Theme_Keyword: Erosion

Theme_Keyword: RUSLE

Theme_Keyword: RUSLE2

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Coterminous United States

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Data_Set_Credit:

Acknowledgement of the NOAA Office for Coastal Management and Renard et al. (1997) would be appreciated in products derived from these data.

Native_Data_Set_Environment: MapWindow GIS 8.x

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The cell values in this product represent R-Factor which is an erosivity index for rainfall and runoff. The units are (hundreds ft-tonf-in)/(ac-h-yr).

Logical_Consistency_Report:

Tests for logical consistency indicate that all row and column positions in the selected latitude/longitude window contain data. Conversion and integration with vector files indicates that all positions are consistent with earth coordinates covering the same area.

Completeness_Report:

All pixels within the coterminous U.S. boundary contain R-Factor values.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: This map is an approximation of spatial rainfall-runoff values

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: None

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: NOAA, National Ocean Service, Office for Coastal Management

Publication_Date: Unknown

Publication_Time: Unknown

Title: R-Factor for the Coterminous United States

Geospatial_Data_Presentation_Form: raster digital data

Source_Scale_Denominator: 250000000

Type_of_Source_Media: disc

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1975

Beginning_Time: Unknown

Ending_Date: 1997

Ending_Time: Unknown

Source_Currentness_Reference: Paper map

Source_Citation_Abbreviation: R-Factor

Source_Contribution: Derived from isoerodent maps (Renard et al., 1997)

Process_Step:

Process_Description:

The rainfall-funoff erosivity factor was estimated from the R-Factor maps for the coterminous U.S. given in the Agriculture Handbook number 703. A line shapefile approximation of the printed map was generated via "heads-up" digitizing. The final raster map was produced using the Topo to Raster command in ESRI ArcGIS 10.x.

Process_Date: 2013

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Cloud_Cover: 0

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Albers Conical Equal Area

Albers_Conical_Equal_Area:

Standard_Parallel: 29.5

Standard_Parallel: 45.5

Longitude_of_Central_Meridian: 96

Latitude_of_Projection_Origin: 23

False_Easting: 0.00000

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 800

Ordinate_Resolution: 800

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum 1983

Ellipsoid_Name: GRS80

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1983

Altitude_Resolution: 1

Altitude_Distance_Units: meters

Altitude_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: R-Factor map for the U.S.

Entity_Type_Definition: Coterminous U.S. states

Entity_Type_Definition_Source: unknown

Attribute:

Attribute_Label: Rainfall-runoff Factor

Attribute_Definition: R-Factor is an erosivity index value for rainfall and runoff

Attribute_Definition_Source:

Renard, K.G., Foster, C.R., Weesies, G.A., McCool, D.K., Yoder, D.C., (1997). Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE). US Department of Agriculture, Agriculture Handbook Number 703, Government Printing Office, Washington, DC, p. 47-51.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0 Background

Enumerated_Domain_Value_Definition: This class contains no data.

Enumerated_Domain_Value_Definition_Source: N/A

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1 R-Factor

Enumerated_Domain_Value_Definition: Erosivity index value for rainfall and runoff.

Enumerated_Domain_Value_Definition_Source:

Renard, K.G., Foster, C.R., Weesies, G.A., McCool, D.K., Yoder, D.C., (1997). Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE). US Department of Agriculture, Agriculture Handbook Number 703, Government Printing Office, Washington, DC, p. 47-51.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Resource_Description: Downloadable data

Distribution_Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.

Metadata_Reference_Information:

Metadata_Date: 20150310

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998