Metadata for Ecological Unit Subsections, USFS Northern Region, 1997 Metadata for Ecological Unit Subsections, USFS Northern Region, 1997

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Identification Information:

Citation:

Originator:: Nesser, John A, Ford, Gary L, Maynard, C Lee, Page-Dumroese, Deborah S.
Publication date: 10/01/1997
Title: Ecological Unit Subsections, USFS Northern Region, 1997
Other citation details:: The former name of the data set on the NRIS web site was "ot118"
Online linkage: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Shapefiles/EcoUnit1997.zip

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Thumbnails/19960101_574_thumb.jpg
Browse graphic file description: Thumbnail image of Northern Region Ecological Unit Subsections map

Browse graphic file name: https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Individual/19960101_574_1996_MTIDNDEcoSub.gif
Browse graphic file description: Northern Region Ecological Unit Subsections map

Abstract:

Subsections are regions with similar surficial geology, lithology, geomorphic process, soil groups, subregional climate, and potential natural communities.

Purpose: Strategic multiforest, multiagency, or statewide planning.

Time period of content:

Beginning date: 1990
Ending date: 11/01/1996
Currentness reference: Publication Date

Status:

Progress: Complete

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, Montana 59620-1800
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov

Data Quality Information:

Attribute accuracy report:

Interpretations at this level are based on many assumptions, generalizations, and averages.

Horizontal Positional Accuracy Report:

Approximate horizontal accuracy is 254 meters, assuming source data meets National Map Accuracy Standards.

Lineage:

Source information:

Originator: A. W. Kuchler
Publication date: 1964
Title: Potential Natural Vegetation of the conterminous U.S.
Source scale denominator: 3168000
Type of source media: paper
Calendar date: 1964

Source information:

Originator: U.S. Geological Survey
Publication date: 1955
Title: Geologic Maps of Idaho, Montana, Wyoming, North Dakota
Other citation details: Idaho: 1978, Montana: 1955, Wyoming: 1985, N Dakota: 1995
Source scale denominator: 500000
Type of source media: paper
Source contribution:: The data was drafted on mylar overlays on these maps, based on the information on these and other maps.
Beginning date: 1955
Ending date: 1995

Source information:

Originator:: Nesser, John A, Ford, Gary L, Maynard, C Lee, Page-Dumroese, Deborah S.
Publication date: 1997
Title: Ecological Unit Subsections, USFS Northern Region

Process step:

Ecological units were drafted on 1:500,000 scale Geologic maps by soil scientists of the Northern Region forests, based on their knowledge and soil, climate, geologic, and vegetation maps available to them.


Process date: 11/01/1996

Spatial Data Organization Information:

Point and vector object information:

SDTS object type: G-polygon

SDTS object count: 117

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
Standard parallel: 49
Longitude of central meridian: -109.5
Latitude of projection origin: 44.25
False easting: 600000.00000
False northing: 0.00000

Planar distance units: meters

Geodetic model:

Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137
Denominator of flattening ratio: 298.257

Entity and Attribute Information:

Entity type label: Subsection.dbf

Entity type definition: Polygon Attribute Table

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: Feature geometry

Attribute label: OT118_ID

Attribute definition: ID Number from original coverage dataset

Attribute label: SUBSECTION

Attribute definition:: Subsection
This is the subsection identifier

Attribute label: SECTION

Attribute definition:: Section
This is the Section identifier, which is included in the first 5 digits of the subsection attribute.

Attribute label: PROVINCE

Attribute definition:: Province
The province identifier is the first three characters of the subsection identifier.

Attribute label: ACRES

Attribute definition:: Acres
This is a calculated value derived from the feature geometry.
Range domain minimum: 0
Range domain maximum: 15823774

Attribute label: Sub_Text