R-Factor for Alaska

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Metadata:

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: 20140606
Title: R-Factor for Alaska
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:
Fletcher, Joel E.; Huber, A. Leon; Haws, Frank W.; and Clyde, Calvin G., "Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II, Recommendations for Preparing Design Manuals and Appendices B, C, D, E, F, G, and H" (1977). Reports. P 119.
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 Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II. (Fletcher et al., 1977). Lines connecting points of equal rainfall erosivity are called isoerodents. The isoerodents plotted on a map of Alaska 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,WGS84, WGS84.
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 Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II. (Fletcher et al., 1977). Fletcher, Joel E.; Huber, A. Leon; Haws, Frank W.; and Clyde, Calvin G., "Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II, Recommendations for Preparing Design Manuals and Appendices B, C, D, E, F, G, and H" (1977). Reports. P 119.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1965
Beginning_Time: Unknown
Ending_Date: 1975
Ending_Time: Unknown
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 167.930127
East_Bounding_Coordinate: -123.346463
North_Bounding_Coordinate: 71.406230
South_Bounding_Coordinate: 52.510506
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: Alaska
Place_Keyword: Coastal zone
Place_Keyword: Alaska
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 Fletcher et al., (1977) 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 Alaska 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 Alaska
Geospatial_Data_Presentation_Form: raster digital data
Source_Scale_Denominator: 100000
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1965
Beginning_Time: Unknown
Ending_Date: 1975
Ending_Time: Unknown
Source_Currentness_Reference: Paper map
Source_Citation_Abbreviation: R-Factor
Source_Contribution: Derived from isoerodent maps (Fletcher et al., 1977)
Process_Step:
Process_Description:
The rainfall-runoff erosivity factor was estimated from the R-Factor map for Alaska given in Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II. (Fletcher et al., 1977). 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: 2014
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: 55.000000
Standard_Parallel: 65.000000
Longitude_of_Central_Meridian: -154.000000
Latitude_of_Projection_Origin: 50.000000
False_Easting: 0.000000
False_Northing: 0.000000
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: World Geodetic System 1984
Ellipsoid_Name: World Geodetic System 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: World Geodetic System 1984
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 Alaska
Entity_Type_Definition: State
Entity_Type_Definition_Source: United States of America
Attribute:
Attribute_Label: Rainfall-runoff Factor
Attribute_Definition: R-Factor is an erosivity index value for rainfall and runoff
Attribute_Definition_Source:
Fletcher, Joel E.; Huber, A. Leon; Haws, Frank W.; and Clyde, Calvin G., "Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II, Recommendations for Preparing Design Manuals and Appendices B, C, D, E, F, G, and H" (1977). Reports. P 119.
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:
Fletcher, Joel E.; Huber, A. Leon; Haws, Frank W.; and Clyde, Calvin G., "Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II, Recommendations for Preparing Design Manuals and Appendices B, C, D, E, F, G, and H" (1977). Reports. P 119.
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
Generated by mp version 2.9.30 on Thu Apr 9 10:10:31 2015