File:C.1993. USFS aerial observer Keith Sprengel working on aerial survey maps in the Regional Office map room. Portland, Oregon. (35450378062).jpg

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USFS aerial observer Keith Sprengel working on aerial survey maps in the Regional Office map room. Portland, Oregon.

Photo by: Julie Johnson Date: Unknown. circa 1993

Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Collection: Region 6, Forest Health Protection, Aerial Survey Program slide collection.

For geospatial data collected during annual aerial forest insect and disease detection surveys see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-...

For related historic program documentation see: archive.org/details/AerialForestInsectAndDiseaseDetection... Johnson, J. 2016. Aerial forest insect and disease detection surveys in Oregon and Washington 1947-2016: The survey. Gen. Tech. Rep. R6-FHP-GTR-0302. Portland, OR: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. 280 p.

Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
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Source c.1993. USFS aerial observer Keith Sprengel working on aerial survey maps in the Regional Office map room. Portland, Oregon.
Author R6, State & Private Forestry, Forest Health Protection

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This image is a work of the Forest Service of the United States Department of Agriculture. As a work of the U.S. federal government, the image is in the public domain.

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current21:46, 4 August 2017Thumbnail for version as of 21:46, 4 August 20171,668 × 1,152 (1.26 MB)Kingofthedead (talk | contribs)Transferred from Flickr via Flickr2Commons

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