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This data represents areas of forest damage due to insect infestation,
fire, flood, landslides, windthrow and other mortalities. The information was
collected by aerial surveys by both the USFS and ADNR, Div. of Forestry in
cooperation with the Forest Health Protection (FHP) project.
Surveys are conducted in July and August so that pest "signatures" may
be obtained during the optimal period for symptom development of ocular estimation.
The aerial survey is coordinated with known pest outbreaks so that the maximum extent
of recent bark beetle damage (fading trees) and insect defoliation (discoloration,
foliage loss) patterns may be determined. Aerial survey flights are termed as
"local" if they can be completed within 1 day from the survey base and "regional'
if more than 1 day is required to complete the survey reconnaissance.
Data Provided By:
Alaska Department of Natural Resources, Information Resource Management
It is not recommended the data be used at a scale larger than 1:250000.
Any hardcopies or published datasets utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Alaska Department of Natural Resources.
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