Precipitation Intensity Cells for Washington State, Oregon Climate Service
Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information
Identification Information
Section Index
Citation:
Citation Information:
Originator: MGS Engineering Consultants and Oregon Climate Service
Publication Date: 200601
Title: Precipitation Intensity Cells for Washington State, Oregon Climate Service
Geospatial Data Presentation Form: raster digital data
Online Linkage: \gisosc\geodata\maps\250k\OSU\precipevents
Description:
Abstract:
Maps of extreme precipitation intensities for the state of Washington, created using point values of extreme precipitation, interpolated to a spatial grid using L-Moments calculations and long-term averages produced by the PRISM model. Input stations include NOAA Cooperative, Environment Canada, NRCS SNOTEL, and other stations. Output grids and maps represent estimated 2-hour and 24-hour average precipitation values for the following return periods: 6 months, 2 years, 10 years, 25 years, 50 years, 100 years and 500 years. Data format in ARC-compatible ASCII grids. Included in this collection of data is a data set representing mean annual precipitation.
Purpose: Display and/or analysis requiring precipitation intensity.
Supplemental Information:
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 orographic precipitation
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 1/2006
Time of Day: Unknown
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -126.541809
East Bounding Coordinate: -115.55832
North Bounding Coordinate: 50.118107
South Bounding Coordinate: 44.864135
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: precipitation
Theme Keyword: isopluvial
Theme Keyword: rainfall intensity
Place:
Place Keyword Thesaurus: none
Place Keyword: Washington state
Access Constraints: none
Use Constraints: none
Point of Contact:
Contact Information:
Contact Person Primary:
Contact Person: Rose Peralta
Contact Organization: Washington State Department of Transportation, Hydraulics Group
Contact Position: HQ Hydraulic Engineer
Contact Voice Telephone: (360) 705-7260
Hours of Service: Mon, Wed, Thurs. 6:30- 5:00
Data Set Credit: Project sponsored by Washington Department of Transportation, performed by MSG Engineering Consultants and Oregon Climate Service
Native Data Set Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Data Quality Information
Section Index
Attribute Accuracy:
Attribute Accuracy Report: none provided
Logical Consistency Report: none provided
Completeness Report: none provided
Lineage:
Process Step:
Process Description:
Data delivered in ASCII text format. Precipitation gridded data files are stored in standard ESRI ASCII Text format with a 6 line header such as:
ncols 702
nrows 215
xllcorner -129.01041666667
yllcorner 44.989652777946
cellsize 0.020833333333
NODATA_value -9.99
Text document was converted to grids in ArcCatalog using the ArcToolbox ASCII to Raster tool.
The raster grids were then given a projection definition of geographic decimal degrees Nad 1983. The raster grids were then reprojected to State Plane South Harn.
Process Date: 200602
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: Mark Bruskiewicz
Contact Organization: Environmental Services
Contact Position: GIS Data Administrator
Contact Address:
Address Type: mailing and physical address
Contact Voice Telephone: 360 705-7444
Contact Electronic Mail Address: bruskim@wsdot.wa.gov
Process Step:
Process Description: The original data for mean annual precipitation was in millimeters. Using Spatial Analyst raster calculator tool the data was converted into inches by dividing the millimeter value by 25.4.
Process Date: 200604
Cloud Cover: 0
Spatial Data Organization Information
Section Index
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Grid Cell
Row Count: 460
Column Count: 637
Vertical Count: 1
Spatial Reference Information
Section Index
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: Lambert Conformal Conic
Lambert Conformal Conic:
Standard Parallel: 45.833333
Standard Parallel: 47.333333
Longitude of Central Meridian: -120.5
Latitude of Projection Origin: 45.333333
False Easting: 1640416.666667
False Northing: 0
Planar Coordinate Information:
Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:
Abscissa Resolution: 4060.145722
Ordinate Resolution: 4060.145722
Planar Distance Units: survey feet
Geodetic Model:
Horizontal Datum Name: D_North_American_1983_HARN
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257222
Entity and Attribute Information
Section Index
Detailed Description:
Entity Type:
Entity Type Label: 24 and 2 hour islopluvial
Attribute:
Attribute:
Attribute Label: ObjectID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute Label: Value
Attribute Definition: real values in hundredths of an inch of rain fall.
Distribution Information
Section Index
Resource Description: \gisosc\geodata\maps\250k\OSU\precipevents
Metadata Reference Information
Section Index
Metadata Date: 4/20/2006
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: WSDOT Environmental Services
Contact Person: Mark Bruskiewicz
Contact Position: GIS Data Administrator
Contact Voice Telephone: 360 705-7444
Contact Electronic Mail Address: bruskim@wsdot.wa.gov
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Access Constraints: none
Metadata Use Constraints: none
Metadata Extensions:
Online Linkage: http://www.esri.com/metadata/esriprof80.html
Profile Name: ESRI Metadata Profile
