Name: Oregon Insect And Disease 2012

Display Field: Agent1

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This version of the data schema has been modified by ODF to simplify fields and combine multiple years. The original datasets can be downloaded from the USFS.Each year, all forested federal, state and private land in Oregon and Washington is aerially surveyed for insect, disease and abiotic tree damage. This survey is flown cooperatively by the Region 6 US Forest Service, Forest Health Protection group; the Oregon Department of Forestry, Insect and Disease Section; and the Washington Department of Natural Resources. Data is collected during annual surveys that are generally flown from early July through September. The accuracy of polygon placement and polygon attributes is limited by several factors, including: surveyor experience, weather, time of day, time of year and visibility. Areas that are not flown (due to fires, smoke, weather, restricted air space, etc) are designated in the data with large 'NF' (not flown) polygons. However, the not flown areas were not documented for most of the 80's. Historically, the surveys were flown in fixed-wing aircrafts on various grid patterns. Areas of activity were sketched on 1:126,720 Forest visitor maps and/or 1:100,000 USGS paper maps by two flight observers, each one sketching approximately a two mile swath out their side of the plane. After the flight, the two observer's maps were combined and overlapping polygons were resolved on a final map. The data was then manuscripted on a stable base and scanned; it was edited and attributed using ESRI ArcInfo software. In 2000, the Region 6 aerial surveyors began beta-testing a digitally assisted sketch mapping system. GeoLink software allows the surveyor to digitize and attribute the damage polygons in real time, using GPS and a geo-referenced, digital base map on a laptop. After the flight, the data is converted to Arcview shape files and processed. Since 2000, portions of the regional surveys have been flown using this software. Since 2003, 100 percent of the surveys have been flown using GeoLink. For 1996 to present, geospatial data showing when areas were flown, which data capture method was used, and who flew the area are available on request from Forest Health Protection, State and Private Forestry, Pacific Northwest Region, Forest Service, US Department of Agriculture. Historical reports of forest health conditions, which contain additional information on each year's aerial surveys, are located online at: http://www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-diseases.

Copyright Text: Forest Health Protection, State and Private Forestry, Pacific Northwest Region, Forest Service, U.S. Department of Agriculture; Oregon Department of Forestry, Insect and Disease Section; and Washington Department of Natural Resources, Resource Protection Division

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Spatial Reference: 102100  (3857)

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• Value: Animal Damage
  Label: Animal Damage
  Description: N/A
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• Value: Defoliation: Disease
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