Metadata for Yellowstone River 1948-1951 Aerial Photograph Mosaics
Identification Information:
Citation:
Originator: DTM Consulting, Inc.
Publication date: 03/16/2006
Title: Yellowstone River 1948-1951 Aerial Photograph Mosaics
Publication place: Helena, Montana
Publisher: Montana State Library
Online linkage: ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Imagery/1950/

Abstract:
Aerial photo mosaics of the Yellowstone River corridor. Images may be a mix of years from 1948 to 1951, in MrSID format. These images range in size from 2 to 43 megabytes.

These images were georeferenced to 1995 U.S. Geological Survey Digital Orthophoto Quadrangles. Positional accuracy was targeted on the river corridor. Little effort was made to reference the upland areas in regions of high relief.

In general, there is one image for each county, from Sweet Grass, Montana, to McKenzie, North Dakota. Yellowstone County is divided into 2 images.

Some older GIS applications may need .sdw files to accompany these files for georeferencing information. ESRI's ArcMap needs .aux files to read the coordinate system of the images from. These files may be accessed at ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Imagery/1950/aux_and_sdw.zip.

The cell size of the images varies from 1 to 2.5 meters:
McKenzie - 1.879
Richland - 1.823
Dawson - 2.394
Prairie - 1.882
Custer - 2.462
Rosebud - 1.853
Treasure - 1.790
Yellowstone - 1.000
Stillwater - 1.000
Sweet Grass - 1.000
Purpose:
Developed as part of the Yellowstone River Cummulative Effects Study. Imagery is intended for reach level analysis of changes in the Yellowstone River Corridor.

Time period of content:
Beginning date: 1948
Ending date: 1951
Currentness reference: ground condition
Status:
Progress: Complete
Maintenance and update frequency: None planned
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:
Jim Robinson
Montana DNRC
P.O. Box 201601
Helena, Montana 59620-1601


Telephone: (406) 444-4247
E-Mail: jrobinson@mt.gov


Data set credit: Prepared by DTM Consulting, Inc., Bozeman, MT.
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Data Quality Information:
Horizontal Positional Accuracy Report:
Individual images were georeferenced to 1995 DOQs at a scale of approximately 1:6,000. Number of registration points varied depending on the ammount of distortion in the original photograph. Positional accuracy targeted the river corridor. Little effort was made to reference the upland areas in regions of high relief.

Lineage:
Source information:
Originator: U.S. Geological Survey
Title: Circa 1950 Aerial Photos
Publication place: Sioux Falls, SD
Publisher:
U.S. Geological Survey
Earth Resources Observation Systems (EROS) Data Center
Online linkage: http://edc.usgs.gov/products/aerial.html
Source contribution:
This is the source of the images for Sweet Grass, Stillwater, and western Yellowstone counties.

The EROS Data Center has archived thousands of rolls of film containing several million frames of historical aerial and satellite photographs dating back to the 1930's gathered from various Federal agencies. This archive includes the rather well known, often utilized NHAP and NAPP film, but the largest portion of this archive consists of original film acquired in support of the USGS 1:24,000 topographic quadrangle map series, taken during the 1940s through the 1970s. Most of this photography is reasonably large scale to support the production of the quadrangle maps. USGS EROS has implemented a medium-resolution digital product. The medium-resolution files are created at approximately 600 dpi with an output image size of around five inches square.
Beginning date: 1948
Ending date: 1951
Source information:
Originator: U.S. National Archives and Records Administration (NARA)
Title: Circa 1950 Aerial Photos
Publication place: Washington, DC
Publisher: U.S. National Archives and Records Administration (NARA)
Online linkage: http://www.archives.gov/research/formats/cartographic.html
Source contribution:
This is the source of the images for Treasure, Rosebud, Custer, Prairie, Dawson, Richland, McKenzie, and eastern Yellowstone counties.
Beginning date: 1948
Ending date: 1951

Process step:
Original scans were recieved by DTM Consulting from the U.S. Army Corps of Engineers on two different external hard drives.
Process step:
ENVI was used to georeference individual images to match 1995 DOQs. Control points focused on the river corridor. When the georeferencing closely matched unchaged areas in the DOQs, the image was rectified and saved as a new TIF image with referencing information. Edge matching between overlapping images was performed so that the 'top' image represented the best georeferencing.
Process step:
All images each county were mosiaced into a single TIF image, or into 2 images for Yellowstone County, using ENVI.
Process date: 2005
Process contact:
Tony Thatcher
DTM Consulting, Inc.
Telephone: 406-585-5322
E-Mail: tony@dtmgis.com


Process step:
The mosaic images provided by DTM Consulting to the State Library were converted to MrSID format.
Process date: 03/15/2006
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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
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Distribution Information:
Distributor:
Montana State Library
PO Box 201800
Helena, MT 59620-1800


Telephone: 406-444-5354
TDD/TTY telephone: 406-444-4799
Fax: 406-444-0266
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: MrSID
Online option:
ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Imagery/1950/
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Metadata Reference Information:
Metadata date: 10/29/2013
Metadata review date: 04/17/2013
Metadata review date: 04/17/2006
Metadata contact:
Montana State Library
PO Box 201800
Helena, Montana 59620-1800


Telephone: 406-444-5354
TDD/TTY telephone: 406-444-4799
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov


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