1979. Aerial insect detection survey summary report, "Extent of Damage in Oregon in 1979 by Reporting Area and B.F." This page shows tree damage summarized for ranger districts on the Deschutes National Forest in Oregon.

Aerial insect detection survey summary report, "Extent of Damage in Oregon in 1979 by Reporting Area and B.F." This page shows tree damage summarized for ranger districts on the Deschutes National Forest in Oregon.

 

Note: Acreage was calculated by planimeter and/or dot-counting the insect and disease polygons on paper aerial survey maps. Volumes were then calculated using numbers of dead trees, tree species, and an average volume/tree/Reporting Area. These data were summarized in Fort Collins, Colorado.

 

This process was replaced with a Geographic Information System (GIS) in Region 6 in 1988. All of these early reports were eventually replaced by more precise geospatial data.

 

Date: February 1, 1979

 

Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.

Source: Aerial Survey Program 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, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

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