Name: TCA: Insect and Pathogen Incidence 2014 to 2018

Display Field: Value

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Description: Data are derived from 2014-2018 (0-5 years) aerial detection surveys for tree defoliation and mortality from the USFS Forest Health Assessment & Applied Sciences Team (FHAAST) National Forest Pest Conditions Database. Polygons are created by aerial sketch mapping, and coded for defoliation and mortality, in addition to other damage codes. Defoliation and mortality layers were created from the polygon data and the attribute codes. The layers were merged to compensate for difficulties in identifying defoliation separately from mortality in hardwoods vs. conifer forests. Areas that were defoliated during three of the years recorded in the five-year dataset are thought to have significant impacts and likely mortality, so these polygons were added to the mortality layer. The layer includes areas with mortality classed as “very light”.

Copyright Text: Source: USFS FHAAST custom product (https://www.fs.fed.us/foresthealth/applied-sciences/) (August 30 2019)

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Spatial Reference: 102100  (3857)

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