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Illinois Historic Aerial Photographs, 1936-1941

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Stephenson County

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Title	Stephenson County
Creator	United States. Agricultural Adjustment Administration
Contributors	Midwest Aerial Surveys, Inc.
Date Original	1939
Date Digital	2011
Subject [LCSH]	Stephenson County (Ill.)Aerial photographs
Description	Flights flown between July 2, 1939 and July 29, 1939 by Midwest Aerial Surveys, Inc., for the U. S. Dept. of Agriculture, Agricultural Adjustment Administration. Photos numbered BXH-1-3 through BXH-4-128. Scale not given. Stereoscopic coverage. Only indexes are georeferenced.
Coverage.Spatial	Stephenson County (Ill.) / W0895500-W0892400 / N0423000-N0421200
Contributing Institution	Illinois State Geological Survey
Format.Use	209 remote-sensing images, 1.17 gigabytes, average file 5.73 megabytes
Format.Creation	Scanned from 7 x 9 contact prints (nominal scale ca. 1:20,000) on Crosfield Celsis 6200 drum scanning system at 750 dpi. Quality assurance target not published but available by contacting the Illinois State Library Map Dept. MrSID files compressed at a target ratio of 12:1. Uncompressed TIFF images on cd available from the Illinois State Library Map Dept.
Relation.Requires	Mode of access: World Wide Web. System requirements: Plug-in or image viewer, ExpressView Browser plug-in available for download. System requirements for interactive map: Google Chrome best.
Identifier.URL	Text based access, through the accompanying scanned county line index: http://www.isgs.uiuc.edu/nsdihome/webdocs/ilhap/county/stephenson.html Interactive access, through the ArcIMS interactive map: http://www.isgs.uiuc.edu/nsdihome/webdocs/ilhap/launchims.html
Language	eng
Type	Image

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