1970. Aerial detection survey summary report, "Extent of Damage in Oregon in 1970 by Reporting Area and B.F." This page shows tree damage summarized for ranger districts on the Rogue River National Forest in Oregon.

Aerial detection survey summary report, "Extent of Damage in Oregon in 1970 by Reporting Area and B.F." This page shows tree damage summarized for ranger districts on the Rogue River National Forest in Oregon.

 

Note: Acreage was calculated by planimeter and/or dot-counting the insect and disease polygons directly on the paper aerial survey maps. Volumes were calculated using numbers of dead trees, tree species, and an average volume/tree/Reporting Area. Data were entered into a system in Fort Collins, Colorado for summarization.

 

This process was replaced with a GIS in Region 6 in 1988. All of these early data reports were eventually replaced by geospatial data.

 

Date: October 8, 1970

 

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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