Metadata for Montana Surface Water Supply (SWSI) Drought Index Areas Metadata for Montana Surface Water Supply (SWSI) Drought Index Areas

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Identification Information:

Citation:

Originator: Montana State Library
Publication date: 2000
Title: Montana Surface Water Supply (SWSI) Drought Index Areas
Other citation details:: The former name of this dataset on the NRIS web site was "hd47"

Browse graphic file name: http://docs.msl.mt.gov/geoinfo/Images/metadata/hd47.gif

Abstract:

This layer shows areas of Montana for which staff of the Montana Office of the Natural Resources Conservation Service (NRCS) calculate a monthly Surface Water Supply Index (SWSI) value. The SWSI is determined for areas that rely on snow melt as the primary source of surface water. The regions were derived from 4th-code subbasin hydrologic unit boundary (HUC) data, modified based on input from NRCS personnel. Some SWSI areas are arbitrary-width, uniform buffers along streams, some are one or more HUCs, and some are truncated HUCs. Polygons in this layer whose NAME field is blank are not SWSI areas.

There are two versions of the layer. One version was used until the end of 1999. The SWSI areas were modified in 2000 and the pre-2000 SWSI maps on the State Library web site were replaced with maps showing the new areas. The 1992 version of the layer contains SWSI data values for February 1992 through February 1995.

Time period of content:

Calendar date: 2000
Currentness reference: Publication Date

Access constraints: None

Use constraints:

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:

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

Spatial Reference Information:

Horizontal coordinate system definition:

Grid coordinate system name: State Plane Coordinate System 1983

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: SWSI_2000

Entity type definition: Polygon feature class

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: feature geometry

Attribute label: SWSI4_

Attribute definition: Esri coverage feature sequence number

Attribute label: SWSI4_ID

Attribute definition: Esri coverage feature ID number

Attribute label: MAJOR

Attribute definition: Major basin number (arbitrary)

Attribute label: NAME

Attribute definition: SWSI area name

Attribute label: NUM

Attribute definition: Basin number used to link SWSI data tables to the map

Attribute label: STREAM

Attribute definition: Alternate SWSI area name, usually a shorter version

Attribute label: SwsiID

Attribute definition: Basin number used to link SWSI data tables to the map

Attribute label: Shape_Leng

Attribute definition: Length of the polygon perimeter in meters

Attribute label: Shape_Area

Attribute definition: Area of the polygon in square meters

Entity type label: SWSI_1992

Entity type definition: Polygon feature class

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: feature geometry

Attribute label: AREA

Attribute definition: Area of the polygon in square meters

Attribute label: PERIMETER

Attribute definition: Length of the polygon perimeter in meters

Attribute label: HD47_

Attribute definition: Esri coverage feature sequence number

Attribute label: HD47_ID

Attribute definition: Esri coverage feature ID number

Attribute label: HUC

Attribute definition: Hydrologic Unit Subbasin Code

Attribute label: ACRES

Attribute definition: Total acreage of management unit

Attribute label: NUM

Attribute definition: Basin number (arbitrary)

Attribute label: MAJOR

Attribute definition: Major basin number (arbitrary)

Attribute label: NAME

Attribute definition:: SWSI area name. Features that do not have names are not SWSI areas.

Attribute label: SWSI950201

Attribute definition: Surface Water Supply Index value for February 1995
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940801

Attribute definition: Surface Water Supply Index value for August 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940701

Attribute definition: Surface Water Supply Index value for July 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940601

Attribute definition: Surface Water Supply Index value for June 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940501

Attribute definition: Surface Water Supply Index value for May 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940401

Attribute definition: Surface Water Supply Index value for April 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI940201

Attribute definition: Surface Water Supply Index value for February 1994
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930701

Attribute definition: Surface Water Supply Index value for July 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930801

Attribute definition: Surface Water Supply Index value for August 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930601

Attribute definition: Surface Water Supply Index value for June 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930501

Attribute definition: Surface Water Supply Index value for May 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930401

Attribute definition: Surface Water Supply Index value for April 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930301

Attribute definition: Surface Water Supply Index value for March 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI930201

Attribute definition: Surface Water Supply Index value for February 1993
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920801

Attribute definition: Surface Water Supply Index value for August 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920701

Attribute definition: Surface Water Supply Index value for July 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920601

Attribute definition: Surface Water Supply Index value for June 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920501

Attribute definition: Surface Water Supply Index value for May 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920401

Attribute definition: Surface Water Supply Index value for April 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920301

Attribute definition: Surface Water Supply Index value for March 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Attribute label: SWSI920201

Attribute definition: Surface Water Supply Index value for February 1992
Attribute domain:: The value of this field is set to 99 for features that are not SWSI areas. Other values may be between -4 and 4. Negative values represent dry conditions while positive values indicate above average water supply. The values are categorized as Extremely Dry (-4.0 to -3.0), Moderately Dry (-2.9 to -2.0), Slightly Dry (-1.9 to -1.0), Near Average (-0.9 to 0.9), Slightly Wet (1 to 1.9), Moderately Wet (2.0 to 2.9), and Extremely Wet (3.0 to 4.0).

Distribution Information:

Distributor:

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

Resource description: Offline Data

Distribution liability:

The Montana State Library Geographic Information Services 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.

Metadata Reference Information:

Metadata date: 11/26/2014

Metadata contact:

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