GEOGRAPHIC INFORMATION

Base Map data for the Powder River Coal Region, Southeastern Montana, 1990

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Data Provider U.S. Geological Survey
Date 1990
Content Type Offline Data
Abstract The data consist of 13 base map themes acquired by the U.S. Geological Survey (USGS) Helena Office to accompany the coal and water resources data published as USGS Open-File Report 90-568. The report is available from the USGS at http://pubs.er.usgs.gov/pubs/ofr/ofr90568, and the coal and water resource layers are available from the State Library at http://mslapps.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={7cd46118ff5146acb51edf7ae2f9d34e}.The base map layers were mostly assembled from 1:100,000 scale USGS Digital Line Graph (DLG) files, which were based on hardcopy maps whose publication dates were from 1979 to 1981. The following layers are available:Roads, Hydrography lines, Hydrography polygons, Miscellaneous transportation (pipelines, powerlines, and airports), and Railroads, from 1:100,000 scale DLG files.Counties and Reservations, from 1:24,000 scale DLG files.River Basins (4th-code hydrologic unit sub-basins), digitized for this project from 1:24,000 scale USGS maps.National Forest Districts, digitized for this project from 1:126,720-scale Custer National Forest visitor's map.Geographic Names, generated from latitude-longitude coordinates available from the Geographic Names Information System (GNIS).Land Use, from USGS 1:250,000 scale Geographic Information Analysis and Retrieval (GIRAS) files. These are based on land use maps made in 1970, 1975, and 1976.7.5-minute (1:24,000 scale) quadrangle boundaries, generated from quadrangle corner latitude-longitude coordinates.60x30-minute (1:100,000 scale) quadrangle boundaries, generated from quadrangle corner latitude-longitude coordinates.The layers are all in UTM Zone 13 NAD 27 coordinates. They were provided to the State Library in ESRI coverage format. Many of the layers were divided into small regional sections. The Library converted the data to shapefiles and combined the regional sections into single datasets for each layer.
Purpose
Supplemental Information
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.
Distributor Montana State Library
PO Box 201800
Helena, MT 59620-1800
Telephone: 406-444-5354
TDD/TTY: Montana Relay 711
Fax: 406-444-0266
Email: geoinfo@mt.gov
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.
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Metadata date 01/08/2015