Metadata for Montana Towns, 2003 Metadata for Montana Towns, 2003

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Identification Information:

Citation:

Originator: Montana State Library

Publication date: 11/01/2003

Title: Montana Towns, 2003

Publication place: Helena, Montana
Publisher: Montana State Library

Other citation details:

The former name of this layer on the NRIS web site was "ct107".

Larger Work Citation:

Title: Montana Towns
Online linkage: https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={81C76ED6-0A8E-4F08-A210-C92C67A8F859}

Abstract:

This layer shows the location and estimated 1990 and 2000 population of 624 towns in Montana. It also shows the number of schools and estimated percent minority population.

Many of these towns are incorporated places or Census Designated places. The populations of these towns are the populations recorded for these places in the 1990 and 2000 Census. The boundaries of these places are available from the State Library.

Some Census Designated places have different names than the corresponding town in this data set -- these names are given in the alt_name field. Several Census Designated places were excluded from this data set because they do not seem to represent an area that can be identified as a town.

Many of these towns are not Census Designated places, and some Census Designated places cover more than one of these towns. In these cases, the population is estimated by adding the populations of all Census Blocks that are completely inside the town area to a proportional population of all the Census Blocks that are partially covered by the town area. If 20 percent of a Census Block is covered by the town area, 20 percent of that block's population is added to the town population.

Where a town is closer than one mile to another town, population was estimated with a two-kilometer diameter circle or a manually defined area rather than a two-mile diameter circle. The populations of Butte and Anaconda are also estimated based on manually-defined areas, since there is no incorporated or Census designated area that corresponds to the built-up areas of these towns. The manually-defined areas are distributed with the towns shapefile in a shapefile named "estborder".

For some towns, the population estimate is zero because no Census Blocks are completely within the circle and the Census Blocks covering the town have very low population density. This does not imply that the State Library believes that the population of these towns is zero. The max90_2mi and max00_2mi fields show how many people might live in or close to these towns.

Where a town was not a Census Designated Place in 1990 but is a Census Designated Place in 2000, the 1990 population is an estimated population for the area covered by the 2000 definition of the place.

Purpose:

This layer is intended for placing point locations of towns on small-scale maps of Montana. Population estimates are included to assist in choosing which towns to show and to allow differential symbolization of towns based on population. The layer was created for the official Montana 2000 highway map, and the towns selected for inclusion in this data are mostly based on the towns that appeared on the 1999 highway map.

Time period of content:

Calendar date: 04/01/2000
Currentness reference: publication date

Status:

Progress: Complete
Maintenance and update frequency: Decennial

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

Data Quality Information:

Lineage:

Source information:

Originator: U.S. Geological Survey
Publication date: 1992
Title: Geographic Names Information System
Online linkage: http://geonames.usgs.gov
Source scale denominator: 24000
Source contribution:: This is the source for the coordinate, name, and county of each town.
Calendar date: 1992

Source information:

Originator: U.S. Census Bureau
Publication date: 08/08/1992
Title: 1990 Census Blocks with Population Data
Online linkage: http://nris.mt.gov/nsdi/nris/cb4.html
Source scale denominator: 100000
Source contribution:: This is the source of the 1990 Census block locations and populations that were used to estimate the 1990 population and percent minority of the towns that were not incorporated or Census Designated places in 1990.
Calendar date: 04/01/1990

Source information:

Originator: U.S. Census Bureau
Publication date: 1990
Title: 1990 Population of Places
Online linkage: http://ceic.commerce.mt.gov/Demog/1990dec/popplc.HTM
Source contribution:: This is the source of the 1990 populations of the incorporated and Census Designated places.
Calendar date: 04/01/1990

Source information:

Originator: U.S. Census Bureau
Publication date: 2001
Title: 2000 Census Blocks with Population Data
Online linkage: http://nris.mt.gov/nsdi/tgr2000/default.asp?Dtype=statep
Source scale denominator: 100000
Source contribution:: This is the source of the 2000 Census block locations and populations that were used to estimate the 2000 population and percent minority of the towns that were not incorporated or Census Designated places in 2000.
Calendar date: 04/01/2000

Source information:

Originator: U.S. Census Bureau
Publication date: 06/30/2001
Title: 2000 Incorporated and Census Designated Places
Online linkage: http://nris.mt.gov/nsdi/nris/place2000.html
Source scale denominator: 100000
Source contribution:: This is the source of the area covered by and the 2000 populations of the incorporated and Census Designated places.
Calendar date: 04/01/2000

Source information:

Originator: Montana Office of Public Instruction
Publication date: Unpublished Material
Title: List of Public Schools
Source contribution:: This database was used to count the number of schools in each town.

Process step:

Select towns from the GNIS database, join incorporated and Census Designated places to their populations from the 1990 Census table, and estimate the population of the remaining towns with the 1990 Census Blocks data. These estimated populations, stored in the "est98" field, are very subjective.


Process date: 09/01/1998

Process step:

Count the number of schools in each town and figure the 1990 percent minority population.


Process date: 09/01/1998

Process step:

Join the towns to the 2000 Census populations of incorporated and Census Designated places. Determine which towns are newly added to the Census Designated Place list and estimate the 1990 population of the regions covered by these places.


Process date: 06/02/2003

Process step:

Estimate the 1990 and 2000 population of the towns that are not Census Designated places. Estimate the 2000 percent minority population of all the towns.


Process date: 06/02/2003

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: Towns2003

Entity type definition: Point feature class

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: Feature geometry

Attribute label: TOWNS_ID

Attribute definition: Unique Identification number

Attribute label: NAME

Attribute definition: Name of the town

Attribute label: COUNTY

Attribute definition: Name of the county that contains the town.

Attribute label: POP_1990

Attribute definition: 1990 population or population estimate

Attribute label: POP_2000

Attribute definition: 2000 population or population estimate

Attribute label: TYPE_1990

Attribute definition: Type of place, 1990

Attribute label: TYPE_2000

Attribute definition: Type of place, 2000

Attribute label: EST_METHOD

Attribute definition: Method used to estimate population

Attribute label: LON

Attribute definition: Longitude position of the town

Attribute label: LAT

Attribute definition: Latitude position of the town

Attribute label: ELEVATION

Attribute definition:: Elevation of the point location of the town, determined from the 3 arc-second digital elevation model.

Attribute label: SCHOOLS

Attribute definition: Number of public schools

Attribute label: MINOR1990

Attribute definition:: Percent of town population that is in a minority group (any group other than Non-Hispanic Whites) in 1990

Attribute label: MINOR2000

Attribute definition:: Percent of town population that is in a minority group (any group other than Non-Hispanic Whites) in 2000

Attribute label: ALT_NAME

Attribute definition:: Alternate name - this is the name of a Census Designated Place that partially corresponds to the town.

Attribute label: EST90_2KM

Attribute definition:: Estimated population, 1990, of a circle with a diameter of 2 kilometers centered on the town. Set to -1 if no estimate was performed.

Attribute label: MIN90_2MI

Attribute definition:: Population of 1990 Census Blocks that are completely inside a two-mile diameter circle centered on the town. Set to -1 if this was not determined.

Attribute label: EST90_2MI

Attribute definition:: Estimated population, 1990, of a circle with a diameter of 2 miles centered on the town. Set to -1 if no estimate was performed.

Attribute label: MAX90_2MI

Attribute definition:: Total population of 1990 Census Blocks that are wholly or partially inside a two-mile diameter circle centered on the town. Set to -1 if this was not determined.

Attribute label: EST00_2KM

Attribute definition:: Estimated population, 2000, of a circle with a diameter of 2 kilometers centered on the town. Set to -1 if no estimate was performed.

Attribute label: MIN00_2MI

Attribute definition:: Population of 2000 Census Blocks that are completely inside a two-mile diameter circle centered on the town. Set to -1 if this was not determined.

Attribute label: EST00_2MI

Attribute definition:: Estimated population, 2000, of a circle with a diameter of 2 miles centered on the town. Set to -1 if no estimate was performed.

Attribute label: MAX00_2MI

Attribute definition:: Total population of 2000 Census Blocks that are wholly or partially inside a two-mile diameter circle centered on the town. Set to -1 if this was not determined.

Attribute label: EST98

Attribute definition:: Estimate, made in 1998, of the 1990 population of a place. This was a subjective estimate, rounded to the nearest 5 or 10 persons for small places. Set to -1 if no estimate was made.

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:

Metadata Reference Information:

Metadata date: 11/14/2014

Metadata review date: 09/29/2004

Metadata review date: 10/24/2003

Metadata contact:

Montana State Library
PO Box 201800
Helena, MT 49620-1800
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov