GEOGRAPHIC INFORMATION

Digital Orthophoto Quarter Quadrangles (DOQQs) for Montana, 1990-2003

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Data Provider U.S. Geological Survey
Date 07/01/1990 - 09/29/2003
Content Type Downloadable Data
Abstract Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The digital orthophoto quarter quadrangle images (DOQQ) created by the USGS are 1-meter ground resolution, quarter-quadrangle (3.75 minutes of latitude by 3.75 minutes of longitude) images cast on the Universal Transverse Mercator Projection (UTM) on the North American Datum of 1983 (NAD83).The Montana State Library has modified these images to make them available on our web site. They are available as MrSID images, each covering an entire quadrangle. The entire state and Yellowstone National Park are avaialble in Montana State Plane NAD83 coordinates, and large parts of the state are also available in UTM NAD27 coordinates as MrSID images. All of these images are black-and-white, and they were produced from images taken between 1990 and 2003. An index file of the predominant image date for each quarter-quadrangle is available at http://ftp.geoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/DOQQ_BW/doqq_index.zip.
Purpose DOQ's are useful in any application where aerial photographs are required, and they can be used to determine the geographic location of objects visible on the photos.
Supplemental Information
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.
Data Access http://geoinfo.msl.mt.gov/data/Aerial_Photos/doqq
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 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 08/24/2016