Metadata for Montana Average Annual Precipitation, 1961-1990 Metadata for Montana Average Annual Precipitation, 1961-1990

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Identification Information:

Citation:

Originator: Oregon Climate Service
Publication date: 04/1998
Title: Montana Average Annual Precipitation, 1961-1990
Other citation details:: Former names of the data set on the NRIS web site were "precip" and "precip61_90"
Online linkage: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Shapefiles/Precipitation1990.zip

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Thumbnails/20030401_605_thumb.jpg
Browse graphic file description: Thumbnail image of Montana 1961-1990 Average Annual Precipitation map

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Individual/20030401_605_1990_AvgPrecip61to90.gif
Browse graphic file description: Montana 1961-1990 Average Annual Precipitation map

Abstract:

This data contains vector isoline and polygon layers of average annual precipitation for the climatological period 1961-90. 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. Detailed descriptions of the PRISM raster data can be found with the accompanying raster data sets. For further information, the online PRISM homepage can be found at URL:http://www.ocs.orst.edu/prism/prism_new.html.

Time period of content:

Beginning date: 1961
Ending date: 12/31/1990
Currentness reference:: Climatological period from which the point observations were taken.

Status:

Progress: Complete
Maintenance and update frequency:: None planned for the 1961-90 climatological period. However, this data set will most likely be updated every decade for the previous 30-year climatological period.

Access constraints: n/a, no restrictions apply

Use constraints:

Acknowledgement of the following agencies in products derived from these data: Natural Resources Conservation Service (NRCS) Water and Climate Center, NRCS National Cartography and Geospatial Center (NCGC), PRISM Model, and the Oregon Climate Service at Oregon State University.

The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.

Point of contact:

Oregon Climate Service at Oregon State University
Strand Ag Hall 326, Oregon Climate Service, Oregon State University
Corvallis, OR 97331-2209
Telephone: 541-737-5705
Fax: 541-737-5710
E-Mail: oregon@oce.orst.edu

Data set credit:

Chris Daly of Oregon State University and George Taylor of the Oregon Climate Service at Oregon State University

Data Quality Information:

Logical consistency report:

Polygon and chain-node topology present. Checks were made to ensure that no two adjacent polygons are labelled with the same precipitation value. A manual spot check was made of peaks, depressions, and islands.

Completeness report:

Point estimates of precipitation originated from the following sources: National Weather Service Cooperative (COOP) stations, 2) Natural Resources Conservation Service (NRCS) SNOTEL, 3) local networks. All COOP station data were subjected to quality control checks by the National Climatic Data Center (NCDC).

Lineage:

Source information:

Originator: National Climatic Data Center (NCDC)
Publication date: 1991
Title:: U.S. National 1961-1990 Climate Normals, Climatography of the United States No. 81

Source information:

Originator: Natural Resources Conservation Service
Publication date: 1991
Title:: Cooperative Snow Survey Data of Federal - State - Private Cooperative Snow Surveys
Source contribution:: Location and values of known average monthly and annual precipitation
Beginning date: 1961
Ending date: 1990

Source information:

Originator:: Natural Resources Conservation Service, Water and Climate Center
Publication date: Unpublished Material
Title: Local Precipitation monitoring networks
Beginning date: 1961
Ending date: 1990

Source information:

Originator: Defense Mapping Agency
Publication date: 1985
Title:: 1:250,000-scale Digital Elevation Models (DEM) also known as 1-Degree DEM's
Source contribution:: Terrain surface input to PRISM model for estimation of precipitaion between known points.
Calendar date: 1985

Process step:

Filter raster data from a resolution of 4 km to 2 km using a Gaussian filter


Process date: 04/1998

Process step: Contour 2 km raster data


Process date: 04/1998

Process step:

Convert adjacent contour lines to areas or polygons using custom software


Process date: 04/1998

Spatial Data Organization Information:

Point and vector object information:

SDTS object type: Complete chain

SDTS object count: 5310

SDTS object type: GT-polygon composed of chains

SDTS object count: 3474

Spatial Reference Information:

Horizontal coordinate system definition:

Grid coordinate system name: State Plane Coordinate System

SPCS zone identifier: 2500

Lambert conformal conic:

Standard parallel: 45.000000
Standard parallel: 49.000000
Longitude of central meridian: -109.500000
Latitude of projection origin: 44.250000
False easting: 600000.000000
False northing: 0.000000

Planar distance units: meters

Geodetic model:

Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222

Entity and Attribute Information:

Entity type label: Precip1990_Isoline.dbf

Entity type definition: line feature attribute table

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: Feature geometry

Attribute label: F_Num

Attribute definition: Sequence number from original coverage version of the data

Attribute label: F_ID

Attribute definition: ID number from original coverage version of the data

Attribute label: CONTOUR

Attribute definition:: Average annual precipitation, inches
The value of this field is set to 0 for lines that represent the state boundary.

Attribute label: CONTOUR_TXT

Attribute definition:: Average annual precipitation, inches
Text version of the contour field, with 0 values left blank.

Entity type label: Precip1990_Poly.dbf

Entity type definition:

Polygons representing an area with a fixed range of precipitation. The precipitation value is stored as the item RANGE in the attribute table.

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: Feature geometry

Attribute label: AREA

Attribute definition: Area of feature in square meters

Attribute label: PERIMETER

Attribute definition: Perimeter of feature in meters

Attribute label: PRECIP_

Attribute definition: Sequence number from original coverage version of the data

Attribute label: PRECIP-ID

Attribute definition: ID number from original coverage version of the data

Attribute label: RANGE

Attribute definition:: Precipitation value, in inches, representing the center of the precipitation range of the bounding isolines

Attribute label: LEGEND

Attribute definition: Bounding precipitation values in inches.

Distribution Information:

Distributor:

Montana State Library
PO Box 201800
Helena, MT 59620-1800
Telephone: 406-444-5354
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov
E-Mail: geoinfo@mt.gov

Resource description: Downloadable Data

Distribution liability:

The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.

Standard order process:

Digital form:

Metadata Reference Information:

Metadata date: 01/24/2014

Metadata review date: 04/17/2013

Metadata review date: 09/29/2004

Metadata review date: 04/23/1998

Metadata contact:

Tye Parzybok
Oregon Climate Service
Strand Ag Hall 326, Oregon Climate Service, Oregon State University
Corvallis, OR 97331-2209
Telephone: 541-737-5705
Fax: 541-737-5710
E-Mail: parzy@oce.orst.edu