gov.noaa.nmfs.inport:48223 eng UTF8 dataset Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2024-02-29T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) R-Factor for Alaska R-Factor_metadata_for_Alaska 2014-06-06 publication NOAA/NMFS/EDM 48223 https://www.fisheries.noaa.gov/inport/item/48223 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/digitalcoast/tools/qnspect.html WWW:LINK-1.0-http--link QNSPECT Online Resource download mapDigital 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. 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. These data are represented in raster format for use with the Open source Nonpoint Source Pollution and Erosion Comparison Tool (OpenNSPECT). Acknowledgement of the NOAA Office for Coastal Management and Fletcher et al., (1977) would be appreciated in products derived from these data. completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian notPlanned EARTH SCIENCE > AGRICULTURE > SOILS > SOIL EROSION EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > EROSION EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS > RUNOFF theme Global Change Master Directory (GCMD) Science Keywords 17.0 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA place Global Change Master Directory (GCMD) Location Keywords 20.8 Environmental Monitoring Erosion R-Factor RUSLE RUSLE2 Rainfall-Runoff Erosivity Revised Universal Soil Loss Equation theme Alaska Coastal zone place DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian OpenNSPECT project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: R-Factor for Alaska [Data Date Range], https://www.fisheries.noaa.gov/inport/item/48223. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: None otherRestrictions 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. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 48223 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/48223.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference grid eng; US climatologyMeteorologyAtmosphere MapWindow GIS 8.x 167.930127 -123.346463 52.510506 71.40623 | Currentness: Ground Condition 1965 1975 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. false eng false R-Factor map for Alaska 2017-11-16 publication NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/data/digitalcoast/zip/R-Factor-AK.zip WWW:LINK-1.0-http--link https://coast.noaa.gov/data/digitalcoast/zip/R-Factor-AK.zip download dataset Accuracy 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). Horizontal Positional Accuracy This map is an approximation of spatial rainfall-runoff values Vertical Positional Accuracy None Completeness Measure Cloud Cover: 0 Completeness Report All pixels within Alaska boundary contain R-Factor values. Conceptual Consistency 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. 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. 2014-01-01T00:00:00 Source Contribution: Derived from isoerodent maps (Fletcher et al., 1977) | Source Geospatial Form: raster digital data | Type of Source Media: disc 100000 R-Factor for Alaska NOAA, National Ocean Service, Office for Coastal Management 1965 1975