Metadata for Montana 1:100,000 Scale Township and Range Lines Metadata for Montana 1:100,000 Scale Township and Range Lines
Identification Information:
Citation:
Originator: Montana State Library
Publication date: 03/24/1996
Title: Montana 1:100,000 Scale Township and Range Lines
Publication place: Helena, Montana
Publisher: Montana State Library
Other citation details:
The former name of the data set on the NRIS web site was "ab123"
Online linkage: http://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Shapefiles/Township1996.zip
Browse graphic file name: http://ftp.geoinfo.msl.mt.gov/Documents/Maps/Thumbnails/20090825_506_thumb.jpg
Browse graphic file description: Thumbnail image of Montana Townships map
Browse graphic file name: http://ftp.geoinfo.msl.mt.gov/Documents/Maps/Individual/20090825_506_2009_PubSurveyTownships.pdf
Browse graphic file description: Montana Townships map

Abstract:
Montana's townships, including townships "protracted" through unsurveyed areas by the BLM or Forest Service. These features were digitized by the Bureau of Land Management from 1:100,000 scale maps. The Montana State Library combined the individual quadrangles into a single layer, edgematched the features, and populated the attribute fields.

Time period of content:
Beginning date: 1975
Ending date: 1993
Currentness reference: Publication Date
Status:
Progress: Complete
Access constraints: None
Use constraints:
Not for use at scales greater than 1:100000. Not for accurate determination of section corner or property line locations.

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
P.O. 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


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Data Quality Information:
Horizontal Positional Accuracy Report:
Approximate horizontal accuracy is 51 meters, assuming source data meets National Map Accuracy Standards.

Lineage:
Source information:
Originator:
National Mapping Division
U.S. Geological Survey
Publication date: 1975
Title: 1:100,000-scale Quadrangle Public Land Survey mylars
Publication place: Reston, VA
Publisher: U.S. Geological Survey
Source scale denominator: 100000
Type of source media: mylar
Source contribution: All of the coordinates were collected from these maps.
Beginning date: 1975
Ending date: 1993
Source information:
Originator: U.S. Bureau of Land Management Montana Office
Publication date: Unpublished material
Title: Public Land Survey Arc/Info coverages
Source scale denominator: 100000
Type of source media: Arc/Info E00 files on 8mm tape
Source contribution: The data is an edited copy of this source.
Calendar date: 03/21/1996

Process step:
Digitize the lines from the USGS mylar maps and code the arcs and polygons. This was performed by the BLM office in Billings using ADS software on their PRIME minicomputer.
Process date: 06/1994
Process step:
Correct the projection definition of all BLM data and convert any single-precision coverages to double precision. Project coverages from UTM zone 12 coordinates to Albers.
Process date: 03/21/1996
Process step:
Parse the LABEL item in the BLM PCODE file into separate Town, Range, and Section items in the PAT. Correct any errors in the PCODE file that make the parsing AML crash.
Process date: 03/21/1996
Process step:
Add polygon attributes to BLM coverages that had no polygon attributes or no PCODE files.
Process date: 03/21/1996
Process step:
View township, range, and section attributes of every coverage and correct errors.
Process date: 03/21/1996
Process step:
Edit the data to remove more errors and edgematch adjacent quadrangles. Performed by Cedron Jones and Duane Lund at the State Library.
Process date: 02/25/1997
Process step:
Re-code the arc attributes to distinguish between section lines, township lines, the Base Line and Principal Meridian, and the state outline. Drop the arc attribute from BLM, which were mostly missing.
Process date: 05/21/1997
Process step:
Join the tiles into one coverage and dissolve the polygons to remove the internal section lines of each township.
Process date: 05/21/1997
Process step: Fix the town_range designation of half-townships.
Process date: 03/27/2003
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Spatial Data Organization Information:
Point and vector object information:
SDTS object type: G-polygon
SDTS object count: 4210
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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
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Entity and Attribute Information:
Entity type label: Township1996.dbf
Entity type definition: Polygon Attribute Table

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: perimeter of the polygon in meters

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

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

Attribute label: TOWN
Attribute definition: Township Number
Range domain minimum: 0
Range domain maximum: 37

Attribute label: N_S
Attribute definition: Township North or South Designation


Attribute
Value
Definition of
Attribute Value
N Township North of the Base Line
S Township South of the Base Line

Attribute label: RANGE
Attribute definition: Range Number
Range domain minimum: 0
Range domain maximum: 63

Attribute label: E_W
Attribute definition: Range East or West Designation


Attribute
Value
Definition of
Attribute Value
W Range West of the Principal Meridian
E Range East of the Principal Meridian

Attribute label: TOWN_RANGE
Attribute definition:
Combined township, n-s, range, and e-w values that uniquely identify a township

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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:
Format name: ESRI Shapefile
megabytes
Online option:
http://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Shapefiles/Township1996.zip
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Metadata Reference Information:
Metadata date: 01/08/2014
Metadata review date: 04/17/2013
Metadata review date: 09/29/2004
Metadata review date: 03/27/2003
Metadata review date: 01/16/1998
Metadata review date: 12/18/1997
Metadata contact:
Montana State Library
P.O. 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


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