Entry_ID: (required) Entry_Title: United States Average Annual Precipitation, 1961-1990 Group: Data_Set_Citation Originator(s): Chris Daly, Spatial Climate Analysis Service; George Taylor, the Oregon Climate Service at Oregon State University Title: United States Average Annual Precipitation, 1961-1990 Publication_Date: 200009 Publication_Place: Corvallis, OR, USA Publisher: Spatial Climate Analysis Service, Oregon State University; Data_Presentation_Form: Map URL: URL: End_Group Keyword: environment Keyword: geoscientificInformation Keyword: inlandWaters Group: Temporal_Coverage Start_date: 19610101 Stop_date: 19901231 End_Group Data_Set_Progress: Complete Group: Spatial_Coverage Southernmost_Latitude: 24.545220 Northernmost_Latitude: 49.371731 Westernmost_Longitude: -124.762142 Easternmost_Longitude: -66.957227 End_Group Location: United States Location: Alabama Location: Arizona Location: Arkansas Location: California Location: Colorado Location: Connecticut Location: Delaware Location: District of Columbia Location: Florida Location: Georgia Location: Idaho Location: Illinois Location: Indiana Location: Iowa Location: Kansas Location: Kentucky Location: Louisiana Location: Maine Location: Maryland Location: Massachusetts Location: Michigan Location: Minnesota Location: Mississippi Location: Missouri Location: Montana Location: Nebraska Location: Nevada Location: New Hampshire Location: New Jersey Location: New Mexico Location: New York Location: North Carolina Location: North Dakota Location: Ohio Location: Oklahoma Location: Oregon Location: Pennsylvania Location: Rhode Island Location: South Carolina Location: South Dakota Location: Tennessee Location: Texas Location: Utah Location: Vermont Location: Virginia Location: Washington Location: West Virginia Location: Wisconsin Location: Wyoming Group: Data_Resolution Latitude_Resolution: 0.02083333 Longitude_Resolution: 0.02083333 End_Group Access_Constraints: None. Use_Constraints: None. Acknowledgement of the PRISM model, the Spatial Climate Analysis Service at Oregon State University, the Natural Resources Conservation Service (NRCS) Water and Climate Center, the NRCS National Cartography and Geospatial Center (NCGC), and (or) the National Atlas of the United States would be appreciated in products derived from these data. Originating_Center: (required) Group: Data_Center Data_Center_Name: USDA - NRCS National Cartography and Geospatial Center Group: Data_Center_Contact Last_name: USDA - NRCS National Cartography and Geospatial Center First_name: N/A Email: snechero@ftw.nrcs.usda.gov Phone: 817-509-3366 Group: Address 501 W Felix, PO Box 6567 Ft. Worth, TX 76115 USA End_Group End_Group End_Group Storage_Medium: Windows NT Version 4.0 (Build 1381) Service Pack 4; ESRI Arc/INFO 8.0.345 Group: Distribution Distribution_Media: online Distribution_Format : ESRI Shapefile Fees: None End_Group Group: Reference End_Group Group: Summary These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the Spatial Climate Analysis Service, the USDA - NRCS National Water and Climate Center, the USDA - NRCS National Cartography and Geospatial Center, or the U.S. Geological Survey in the use of these data. This map layer shows polygons of average annual precipitation in the contiguous United States, for the climatological period 1961-1990. Parameter-elevation Regressions on Independent Slopes Model (PRISM) derived raster data is the underlying data set from which the polygons and vectors were created. PRISM is an analytical model that uses point data and a digital elevation model (DEM) to generate gridded estimates of annual, monthly and event-based climatic parameters. There are many methods of interpolating precipitation from monitoring stations to grid points. Some provide estimates of acceptable accuracy in flat terrain, but few have been able to adequately explain the extreme, complex variations in precipitation that occur in mountainous regions. Significant progress in this area has been achieved through the development of PRISM (Parameter-elevation Regressions on Independent Slopes Model). PRISM is an analytical model that uses point data and a digital elevation model (DEM) to generate gridded estimates of monthly and annual precipitation (as well as other climatic parameters). PRISM is well suited to regions with mountainous terrain, because it incorporates a conceptual framework that addresses the spatial scale and pattern of precipitation in such regions. Detailed descriptions of the PRISM raster data can be found on the Oregon State University PRISM web page at . Additional information is available through the Natural Resources Conservation Service web pages at the National Water and Climate Center at or through the National Cartography and Geospatial Center at . Other source PRISM data sets are also available in Arc/INFO ASCII GRID format from the Spatial Climate Analysis Service. See for more information. NRCS offers the source PRISM data packaged on 3 CD-ROM's covering the Lower 48 United States. The CD-ROM’s are available as a set for $150.00. The 48 States are broken into three regions: East, Central and West. Each CD contains the annual and monthly precipitation coverages, as well as the gridded data. The CD-ROM's may be ordered through . End_Group Group: Related_URL URL_Type: URL: Group: Description Originator: Defense Mapping Agency Publication_Date: 1985 Title: 1:250,000-scale Digital Elevation Models (DEM) Publication_Information: Publication_Place: Washington, DC Publisher: U.S. Geological Survey Online_Linkage: End_Group End_Group Group: Related_URL URL_Type: URL: Group: Description Originator: U.S. Geological Survey Publication_Date: 1999 Title: State Boundaries of the United States Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: End_Group End_Group Group: DIF_Author Last_name: Rawson First_name: Peg Email: atlasmail@usgs.gov Phone: 703-648-4183 Group: Address 12201 Sunrise Valley Drive Reston, VA 20192 USA End_Group End_Group DIF_Revision_Date: 20060607 Science_Review_Date: